diff --git a/Cargo.toml b/Cargo.toml
index 8f203041..aefbdc61 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "thiserror"
-version = "1.0.63"
+version = "1.0.64"
 authors = ["David Tolnay <dtolnay@gmail.com>"]
 categories = ["rust-patterns"]
 description = "derive(Error)"
@@ -14,7 +14,7 @@ rust-version = "1.56"
 # without the `std` feature (i.e. `no_std`): rust-version = "1.81"
 
 [dependencies]
-thiserror-impl = { version = "=1.0.63", path = "impl" }
+thiserror-impl = { version = "=1.0.64", path = "impl" }
 
 [dev-dependencies]
 anyhow = "1.0.73"
diff --git a/impl/Cargo.toml b/impl/Cargo.toml
index cafcd02a..4195d578 100644
--- a/impl/Cargo.toml
+++ b/impl/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "thiserror-impl"
-version = "1.0.63"
+version = "1.0.64"
 authors = ["David Tolnay <dtolnay@gmail.com>"]
 description = "Implementation detail of the `thiserror` crate"
 edition = "2021"
diff --git a/impl/src/expand.rs b/impl/src/expand.rs
index 0c67ad91..a90abc58 100644
--- a/impl/src/expand.rs
+++ b/impl/src/expand.rs
@@ -36,6 +36,7 @@ fn fallback(input: &DeriveInput, error: syn::Error) -> TokenStream {
         #error
 
         #[allow(unused_qualifications)]
+        #[automatically_derived]
         impl #impl_generics ::thiserror::__private::error::Error for #ty #ty_generics #where_clause
         where
             // Work around trivial bounds being unstable.
@@ -44,6 +45,7 @@ fn fallback(input: &DeriveInput, error: syn::Error) -> TokenStream {
         {}
 
         #[allow(unused_qualifications)]
+        #[automatically_derived]
         impl #impl_generics ::core::fmt::Display for #ty #ty_generics #where_clause {
             fn fmt(&self, __formatter: &mut ::core::fmt::Formatter) -> ::core::fmt::Result {
                 ::core::unreachable!()
@@ -180,6 +182,7 @@ fn impl_struct(input: Struct) -> TokenStream {
         let display_where_clause = display_inferred_bounds.augment_where_clause(input.generics);
         quote! {
             #[allow(unused_qualifications)]
+            #[automatically_derived]
             impl #impl_generics ::core::fmt::Display for #ty #ty_generics #display_where_clause {
                 #[allow(clippy::used_underscore_binding)]
                 fn fmt(&self, __formatter: &mut ::core::fmt::Formatter) -> ::core::fmt::Result {
@@ -195,6 +198,7 @@ fn impl_struct(input: Struct) -> TokenStream {
         let body = from_initializer(from_field, backtrace_field);
         quote! {
             #[allow(unused_qualifications)]
+            #[automatically_derived]
             impl #impl_generics ::core::convert::From<#from> for #ty #ty_generics #where_clause {
                 #[allow(deprecated)]
                 fn from(source: #from) -> Self {
@@ -213,6 +217,7 @@ fn impl_struct(input: Struct) -> TokenStream {
 
     quote! {
         #[allow(unused_qualifications)]
+        #[automatically_derived]
         impl #impl_generics ::thiserror::__private::error::Error for #ty #ty_generics #error_where_clause {
             #source_method
             #provide_method
@@ -429,6 +434,7 @@ fn impl_enum(input: Enum) -> TokenStream {
         let display_where_clause = display_inferred_bounds.augment_where_clause(input.generics);
         Some(quote! {
             #[allow(unused_qualifications)]
+            #[automatically_derived]
             impl #impl_generics ::core::fmt::Display for #ty #ty_generics #display_where_clause {
                 fn fmt(&self, __formatter: &mut ::core::fmt::Formatter) -> ::core::fmt::Result {
                     #use_as_display
@@ -451,6 +457,7 @@ fn impl_enum(input: Enum) -> TokenStream {
         let body = from_initializer(from_field, backtrace_field);
         Some(quote! {
             #[allow(unused_qualifications)]
+            #[automatically_derived]
             impl #impl_generics ::core::convert::From<#from> for #ty #ty_generics #where_clause {
                 #[allow(deprecated)]
                 fn from(source: #from) -> Self {
@@ -469,6 +476,7 @@ fn impl_enum(input: Enum) -> TokenStream {
 
     quote! {
         #[allow(unused_qualifications)]
+        #[automatically_derived]
         impl #impl_generics ::thiserror::__private::error::Error for #ty #ty_generics #error_where_clause {
             #source_method
             #provide_method
diff --git a/src/lib.rs b/src/lib.rs
index 46b45d99..eb46547a 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -258,7 +258,7 @@
 //!
 //!   [`anyhow`]: https://github.com/dtolnay/anyhow
 
-#![doc(html_root_url = "https://docs.rs/thiserror/1.0.63")]
+#![doc(html_root_url = "https://docs.rs/thiserror/1.0.64")]
 #![allow(
     clippy::module_name_repetitions,
     clippy::needless_lifetimes,