diff --git a/src/codegen/mod.rs b/src/codegen/mod.rs
index 4b51d21603..7ae202bf96 100644
--- a/src/codegen/mod.rs
+++ b/src/codegen/mod.rs
@@ -3806,7 +3806,7 @@ fn objc_method_codegen(
         }
     } else {
         let fn_args = fn_args.clone();
-        let args = iter::once(quote! { self }).chain(fn_args.into_iter());
+        let args = iter::once(quote! { &self }).chain(fn_args.into_iter());
         quote! {
             ( #( #args ),* ) #fn_ret
         }
@@ -3825,7 +3825,7 @@ fn objc_method_codegen(
         }
     } else {
         quote! {
-            msg_send!(self, #methods_and_args)
+            msg_send!(*self, #methods_and_args)
         }
     };
 
@@ -3901,7 +3901,7 @@ impl CodeGenerator for ObjCInterface {
         if !self.is_category() && !self.is_protocol() {
             let struct_block = quote! {
                 #[repr(transparent)]
-                #[derive(Clone, Copy)]
+                #[derive(Clone)]
                 pub struct #class_name(pub id);
                 impl std::ops::Deref for #class_name {
                     type Target = objc::runtime::Object;
@@ -3962,6 +3962,17 @@ impl CodeGenerator for ObjCInterface {
                         }
                     };
                     result.push(impl_trait);
+                    if !parent.is_template() {
+                        let parent_struct_name = ctx.rust_ident(parent.name());
+                        let from_block = quote! {
+                            impl From<#class_name> for #parent_struct_name {
+                                fn from(child: #class_name) -> #parent_struct_name {
+                                    #parent_struct_name(child.0)
+                                }
+                            }
+                        };
+                        result.push(from_block);
+                    }
                     parent.parent_class
                 } else {
                     None
diff --git a/tests/expectations/tests/libclang-9/objc_inheritance.rs b/tests/expectations/tests/libclang-9/objc_inheritance.rs
index cd2b085dc3..ef16325e15 100644
--- a/tests/expectations/tests/libclang-9/objc_inheritance.rs
+++ b/tests/expectations/tests/libclang-9/objc_inheritance.rs
@@ -11,7 +11,7 @@ extern crate objc;
 #[allow(non_camel_case_types)]
 pub type id = *mut objc::runtime::Object;
 #[repr(transparent)]
-#[derive(Clone, Copy)]
+#[derive(Clone)]
 pub struct Foo(pub id);
 impl std::ops::Deref for Foo {
     type Target = objc::runtime::Object;
@@ -28,7 +28,7 @@ impl Foo {
 impl IFoo for Foo {}
 pub trait IFoo: Sized + std::ops::Deref {}
 #[repr(transparent)]
-#[derive(Clone, Copy)]
+#[derive(Clone)]
 pub struct Bar(pub id);
 impl std::ops::Deref for Bar {
     type Target = objc::runtime::Object;
@@ -43,10 +43,15 @@ impl Bar {
     }
 }
 impl IFoo for Bar {}
+impl From<Bar> for Foo {
+    fn from(child: Bar) -> Foo {
+        Foo(child.0)
+    }
+}
 impl IBar for Bar {}
 pub trait IBar: Sized + std::ops::Deref {}
 #[repr(transparent)]
-#[derive(Clone, Copy)]
+#[derive(Clone)]
 pub struct Baz(pub id);
 impl std::ops::Deref for Baz {
     type Target = objc::runtime::Object;
@@ -61,6 +66,16 @@ impl Baz {
     }
 }
 impl IBar for Baz {}
+impl From<Baz> for Bar {
+    fn from(child: Baz) -> Bar {
+        Bar(child.0)
+    }
+}
 impl IFoo for Baz {}
+impl From<Baz> for Foo {
+    fn from(child: Baz) -> Foo {
+        Foo(child.0)
+    }
+}
 impl IBaz for Baz {}
 pub trait IBaz: Sized + std::ops::Deref {}
diff --git a/tests/expectations/tests/libclang-9/objc_template.rs b/tests/expectations/tests/libclang-9/objc_template.rs
index 09cc739c1c..88cf209bdf 100644
--- a/tests/expectations/tests/libclang-9/objc_template.rs
+++ b/tests/expectations/tests/libclang-9/objc_template.rs
@@ -11,7 +11,7 @@ extern crate objc;
 #[allow(non_camel_case_types)]
 pub type id = *mut objc::runtime::Object;
 #[repr(transparent)]
-#[derive(Clone, Copy)]
+#[derive(Clone)]
 pub struct Foo(pub id);
 impl std::ops::Deref for Foo {
     type Target = objc::runtime::Object;
@@ -27,15 +27,15 @@ impl Foo {
 }
 impl<ObjectType: 'static> IFoo<ObjectType> for Foo {}
 pub trait IFoo<ObjectType>: Sized + std::ops::Deref {
-    unsafe fn get(self) -> u64
+    unsafe fn get(&self) -> u64
     where
         <Self as std::ops::Deref>::Target: objc::Message + Sized,
     {
-        msg_send!(self, get)
+        msg_send!(*self, get)
     }
 }
 #[repr(transparent)]
-#[derive(Clone, Copy)]
+#[derive(Clone)]
 pub struct FooMultiGeneric(pub id);
 impl std::ops::Deref for FooMultiGeneric {
     type Target = objc::runtime::Object;
@@ -56,10 +56,10 @@ impl<KeyType: 'static, ObjectType: 'static>
 pub trait IFooMultiGeneric<KeyType, ObjectType>:
     Sized + std::ops::Deref
 {
-    unsafe fn objectForKey_(self, key: u64) -> u64
+    unsafe fn objectForKey_(&self, key: u64) -> u64
     where
         <Self as std::ops::Deref>::Target: objc::Message + Sized,
     {
-        msg_send!(self, objectForKey: key)
+        msg_send!(*self, objectForKey: key)
     }
 }
diff --git a/tests/expectations/tests/objc_category.rs b/tests/expectations/tests/objc_category.rs
index 2c39be96be..e0328c708f 100644
--- a/tests/expectations/tests/objc_category.rs
+++ b/tests/expectations/tests/objc_category.rs
@@ -11,7 +11,7 @@ extern crate objc;
 #[allow(non_camel_case_types)]
 pub type id = *mut objc::runtime::Object;
 #[repr(transparent)]
-#[derive(Clone, Copy)]
+#[derive(Clone)]
 pub struct Foo(pub id);
 impl std::ops::Deref for Foo {
     type Target = objc::runtime::Object;
@@ -27,19 +27,19 @@ impl Foo {
 }
 impl IFoo for Foo {}
 pub trait IFoo: Sized + std::ops::Deref {
-    unsafe fn method(self)
+    unsafe fn method(&self)
     where
         <Self as std::ops::Deref>::Target: objc::Message + Sized,
     {
-        msg_send!(self, method)
+        msg_send!(*self, method)
     }
 }
 impl Foo_BarCategory for Foo {}
 pub trait Foo_BarCategory: Sized + std::ops::Deref {
-    unsafe fn categoryMethod(self)
+    unsafe fn categoryMethod(&self)
     where
         <Self as std::ops::Deref>::Target: objc::Message + Sized,
     {
-        msg_send!(self, categoryMethod)
+        msg_send!(*self, categoryMethod)
     }
 }
diff --git a/tests/expectations/tests/objc_class.rs b/tests/expectations/tests/objc_class.rs
index a1de91fb99..5a8a71d164 100644
--- a/tests/expectations/tests/objc_class.rs
+++ b/tests/expectations/tests/objc_class.rs
@@ -14,7 +14,7 @@ extern "C" {
     pub static mut fooVar: Foo;
 }
 #[repr(transparent)]
-#[derive(Clone, Copy)]
+#[derive(Clone)]
 pub struct Foo(pub id);
 impl std::ops::Deref for Foo {
     type Target = objc::runtime::Object;
@@ -30,10 +30,10 @@ impl Foo {
 }
 impl IFoo for Foo {}
 pub trait IFoo: Sized + std::ops::Deref {
-    unsafe fn method(self)
+    unsafe fn method(&self)
     where
         <Self as std::ops::Deref>::Target: objc::Message + Sized,
     {
-        msg_send!(self, method)
+        msg_send!(*self, method)
     }
 }
diff --git a/tests/expectations/tests/objc_class_method.rs b/tests/expectations/tests/objc_class_method.rs
index d28a233da2..d1f39b0c7d 100644
--- a/tests/expectations/tests/objc_class_method.rs
+++ b/tests/expectations/tests/objc_class_method.rs
@@ -11,7 +11,7 @@ extern crate objc;
 #[allow(non_camel_case_types)]
 pub type id = *mut objc::runtime::Object;
 #[repr(transparent)]
-#[derive(Clone, Copy)]
+#[derive(Clone)]
 pub struct Foo(pub id);
 impl std::ops::Deref for Foo {
     type Target = objc::runtime::Object;
diff --git a/tests/expectations/tests/objc_interface.rs b/tests/expectations/tests/objc_interface.rs
index 7cabf762af..c5ba2758b9 100644
--- a/tests/expectations/tests/objc_interface.rs
+++ b/tests/expectations/tests/objc_interface.rs
@@ -11,7 +11,7 @@ extern crate objc;
 #[allow(non_camel_case_types)]
 pub type id = *mut objc::runtime::Object;
 #[repr(transparent)]
-#[derive(Clone, Copy)]
+#[derive(Clone)]
 pub struct Foo(pub id);
 impl std::ops::Deref for Foo {
     type Target = objc::runtime::Object;
diff --git a/tests/expectations/tests/objc_interface_type.rs b/tests/expectations/tests/objc_interface_type.rs
index e8a1596378..2585df6ec1 100644
--- a/tests/expectations/tests/objc_interface_type.rs
+++ b/tests/expectations/tests/objc_interface_type.rs
@@ -11,7 +11,7 @@ extern crate objc;
 #[allow(non_camel_case_types)]
 pub type id = *mut objc::runtime::Object;
 #[repr(transparent)]
-#[derive(Clone, Copy)]
+#[derive(Clone)]
 pub struct Foo(pub id);
 impl std::ops::Deref for Foo {
     type Target = objc::runtime::Object;
diff --git a/tests/expectations/tests/objc_method.rs b/tests/expectations/tests/objc_method.rs
index e24768d28e..7c4fbd4309 100644
--- a/tests/expectations/tests/objc_method.rs
+++ b/tests/expectations/tests/objc_method.rs
@@ -11,7 +11,7 @@ extern crate objc;
 #[allow(non_camel_case_types)]
 pub type id = *mut objc::runtime::Object;
 #[repr(transparent)]
-#[derive(Clone, Copy)]
+#[derive(Clone)]
 pub struct Foo(pub id);
 impl std::ops::Deref for Foo {
     type Target = objc::runtime::Object;
@@ -27,48 +27,48 @@ impl Foo {
 }
 impl IFoo for Foo {}
 pub trait IFoo: Sized + std::ops::Deref {
-    unsafe fn method(self)
+    unsafe fn method(&self)
     where
         <Self as std::ops::Deref>::Target: objc::Message + Sized,
     {
-        msg_send!(self, method)
+        msg_send!(*self, method)
     }
-    unsafe fn methodWithInt_(self, foo: ::std::os::raw::c_int)
+    unsafe fn methodWithInt_(&self, foo: ::std::os::raw::c_int)
     where
         <Self as std::ops::Deref>::Target: objc::Message + Sized,
     {
-        msg_send!(self, methodWithInt: foo)
+        msg_send!(*self, methodWithInt: foo)
     }
-    unsafe fn methodWithFoo_(self, foo: Foo)
+    unsafe fn methodWithFoo_(&self, foo: Foo)
     where
         <Self as std::ops::Deref>::Target: objc::Message + Sized,
     {
-        msg_send!(self, methodWithFoo: foo)
+        msg_send!(*self, methodWithFoo: foo)
     }
-    unsafe fn methodReturningInt(self) -> ::std::os::raw::c_int
+    unsafe fn methodReturningInt(&self) -> ::std::os::raw::c_int
     where
         <Self as std::ops::Deref>::Target: objc::Message + Sized,
     {
-        msg_send!(self, methodReturningInt)
+        msg_send!(*self, methodReturningInt)
     }
-    unsafe fn methodReturningFoo(self) -> Foo
+    unsafe fn methodReturningFoo(&self) -> Foo
     where
         <Self as std::ops::Deref>::Target: objc::Message + Sized,
     {
-        msg_send!(self, methodReturningFoo)
+        msg_send!(*self, methodReturningFoo)
     }
     unsafe fn methodWithArg1_andArg2_andArg3_(
-        self,
+        &self,
         intvalue: ::std::os::raw::c_int,
         ptr: *mut ::std::os::raw::c_char,
         floatvalue: f32,
     ) where
         <Self as std::ops::Deref>::Target: objc::Message + Sized,
     {
-        msg_send ! ( self , methodWithArg1 : intvalue andArg2 : ptr andArg3 : floatvalue )
+        msg_send ! ( * self , methodWithArg1 : intvalue andArg2 : ptr andArg3 : floatvalue )
     }
     unsafe fn methodWithAndWithoutKeywords_arg2Name__arg4Name_(
-        self,
+        &self,
         arg1: ::std::os::raw::c_int,
         arg2: f32,
         arg3: f32,
@@ -77,7 +77,7 @@ pub trait IFoo: Sized + std::ops::Deref {
     where
         <Self as std::ops::Deref>::Target: objc::Message + Sized,
     {
-        msg_send ! ( self , methodWithAndWithoutKeywords : arg1 arg2Name : arg2 arg3 : arg3 arg4Name : arg4 )
+        msg_send ! ( * self , methodWithAndWithoutKeywords : arg1 arg2Name : arg2 arg3 : arg3 arg4Name : arg4 )
     }
 }
 pub type instancetype = id;
diff --git a/tests/expectations/tests/objc_method_clash.rs b/tests/expectations/tests/objc_method_clash.rs
index ba741f8d3a..8370f33fc2 100644
--- a/tests/expectations/tests/objc_method_clash.rs
+++ b/tests/expectations/tests/objc_method_clash.rs
@@ -11,7 +11,7 @@ extern crate objc;
 #[allow(non_camel_case_types)]
 pub type id = *mut objc::runtime::Object;
 #[repr(transparent)]
-#[derive(Clone, Copy)]
+#[derive(Clone)]
 pub struct Foo(pub id);
 impl std::ops::Deref for Foo {
     type Target = objc::runtime::Object;
@@ -27,11 +27,11 @@ impl Foo {
 }
 impl IFoo for Foo {}
 pub trait IFoo: Sized + std::ops::Deref {
-    unsafe fn foo(self)
+    unsafe fn foo(&self)
     where
         <Self as std::ops::Deref>::Target: objc::Message + Sized,
     {
-        msg_send!(self, foo)
+        msg_send!(*self, foo)
     }
     unsafe fn class_foo()
     where
diff --git a/tests/expectations/tests/objc_pointer_return_types.rs b/tests/expectations/tests/objc_pointer_return_types.rs
index 0f222c8b48..c9b6b52a6b 100644
--- a/tests/expectations/tests/objc_pointer_return_types.rs
+++ b/tests/expectations/tests/objc_pointer_return_types.rs
@@ -11,7 +11,7 @@ extern crate objc;
 #[allow(non_camel_case_types)]
 pub type id = *mut objc::runtime::Object;
 #[repr(transparent)]
-#[derive(Clone, Copy)]
+#[derive(Clone)]
 pub struct Bar(pub id);
 impl std::ops::Deref for Bar {
     type Target = objc::runtime::Object;
@@ -28,7 +28,7 @@ impl Bar {
 impl IBar for Bar {}
 pub trait IBar: Sized + std::ops::Deref {}
 #[repr(transparent)]
-#[derive(Clone, Copy)]
+#[derive(Clone)]
 pub struct Foo(pub id);
 impl std::ops::Deref for Foo {
     type Target = objc::runtime::Object;
@@ -44,11 +44,11 @@ impl Foo {
 }
 impl IFoo for Foo {}
 pub trait IFoo: Sized + std::ops::Deref {
-    unsafe fn methodUsingBar_(self, my_bar: Bar)
+    unsafe fn methodUsingBar_(&self, my_bar: Bar)
     where
         <Self as std::ops::Deref>::Target: objc::Message + Sized,
     {
-        msg_send!(self, methodUsingBar: my_bar)
+        msg_send!(*self, methodUsingBar: my_bar)
     }
     unsafe fn methodReturningBar() -> Bar
     where
diff --git a/tests/expectations/tests/objc_property_fnptr.rs b/tests/expectations/tests/objc_property_fnptr.rs
index b9bcf306d8..85f18e9c18 100644
--- a/tests/expectations/tests/objc_property_fnptr.rs
+++ b/tests/expectations/tests/objc_property_fnptr.rs
@@ -11,7 +11,7 @@ extern crate objc;
 #[allow(non_camel_case_types)]
 pub type id = *mut objc::runtime::Object;
 #[repr(transparent)]
-#[derive(Clone, Copy)]
+#[derive(Clone)]
 pub struct Foo(pub id);
 impl std::ops::Deref for Foo {
     type Target = objc::runtime::Object;
@@ -28,7 +28,7 @@ impl Foo {
 impl IFoo for Foo {}
 pub trait IFoo: Sized + std::ops::Deref {
     unsafe fn func(
-        self,
+        &self,
     ) -> ::std::option::Option<
         unsafe extern "C" fn(
             arg1: ::std::os::raw::c_char,
@@ -39,10 +39,10 @@ pub trait IFoo: Sized + std::ops::Deref {
     where
         <Self as std::ops::Deref>::Target: objc::Message + Sized,
     {
-        msg_send!(self, func)
+        msg_send!(*self, func)
     }
     unsafe fn setFunc_(
-        self,
+        &self,
         func: ::std::option::Option<
             unsafe extern "C" fn(
                 arg1: ::std::os::raw::c_char,
@@ -53,6 +53,6 @@ pub trait IFoo: Sized + std::ops::Deref {
     ) where
         <Self as std::ops::Deref>::Target: objc::Message + Sized,
     {
-        msg_send!(self, setFunc: func)
+        msg_send!(*self, setFunc: func)
     }
 }
diff --git a/tests/expectations/tests/objc_protocol.rs b/tests/expectations/tests/objc_protocol.rs
index 5a659b2cbb..e68ddcc1d2 100644
--- a/tests/expectations/tests/objc_protocol.rs
+++ b/tests/expectations/tests/objc_protocol.rs
@@ -12,7 +12,7 @@ extern crate objc;
 pub type id = *mut objc::runtime::Object;
 pub trait PFoo: Sized + std::ops::Deref {}
 #[repr(transparent)]
-#[derive(Clone, Copy)]
+#[derive(Clone)]
 pub struct Foo(pub id);
 impl std::ops::Deref for Foo {
     type Target = objc::runtime::Object;