diff --git a/include/gsl/pointers b/include/gsl/pointers
index 436f09a4..cf0f64c8 100644
--- a/include/gsl/pointers
+++ b/include/gsl/pointers
@@ -297,9 +297,6 @@ public:
     constexpr strict_not_null(const strict_not_null<U>& other) noexcept(std::is_nothrow_move_constructible<T>::value) : not_null<T>(other)
     {}
 
-    // To avoid invalidating the "not null" invariant, the contained pointer is actually copied
-    // instead of moved. If it is a custom pointer, its constructor could in theory throw exceptions.
-    strict_not_null(strict_not_null&& other) noexcept(std::is_nothrow_copy_constructible<T>::value) = default;
     strict_not_null(const strict_not_null& other) = default;
     strict_not_null& operator=(const strict_not_null& other) = default;
     strict_not_null& operator=(const not_null<T>& other)