diff --git a/function_ref.hpp b/function_ref.hpp
index a177e20..60fbb15 100644
--- a/function_ref.hpp
+++ b/function_ref.hpp
@@ -15,7 +15,7 @@
 #define TL_FUNCTION_REF_HPP
 
 #define TL_FUNCTION_REF_VERSION_MAJOR 0
-#define TL_FUNCTION_REF_VERSION_MINOR 2
+#define TL_FUNCTION_REF_VERSION_MINOR 3
 
 #if (defined(_MSC_VER) && _MSC_VER == 1900)
 /// \exclude
@@ -161,11 +161,7 @@ template <class R, class... Args> class function_ref<R(Args...)> {
 
   /// Makes `*this` refer to the same callable as `rhs`.
   TL_FUNCTION_REF_11_CONSTEXPR function_ref<R(Args...)> &
-  operator=(const function_ref<R(Args...)> &rhs) noexcept {
-    obj_ = rhs.obj_;
-    callback_ = rhs.callback_;
-    return *this;
-  }
+  operator=(const function_ref<R(Args...)> &rhs) noexcept = default;
 
   /// Makes `*this` refer to `f`.
   ///