diff --git a/libstdc++-v3/include/bits/forward_list.h b/libstdc++-v3/include/bits/forward_list.h
index 8bcfb809319e..459b2f65ad18 100644
--- a/libstdc++-v3/include/bits/forward_list.h
+++ b/libstdc++-v3/include/bits/forward_list.h
@@ -1046,7 +1046,7 @@ namespace __fwdlist
 	void
 	assign(_InputIterator __first, _InputIterator __last)
 	{
-	  if constexpr (is_assignable<_Tp, decltype(*__first)>::value)
+	  if constexpr (is_assignable<_Tp&, decltype(*__first)>::value)
 	    {
 	      auto __prev = before_begin();
 	      auto __curr = begin();
diff --git a/libstdc++-v3/testsuite/23_containers/forward_list/modifiers/122661.cc b/libstdc++-v3/testsuite/23_containers/forward_list/modifiers/122661.cc
new file mode 100644
index 000000000000..41ac32c7ec6a
--- /dev/null
+++ b/libstdc++-v3/testsuite/23_containers/forward_list/modifiers/122661.cc
@@ -0,0 +1,20 @@
+// { dg-do compile { target c++11 } }
+
+// Bug 122661 - Incorrect value category handling in forward_list::assign
+
+#include <forward_list>
+
+struct S
+{
+  S();
+  S& operator=(S const&) & = delete;
+  S& operator=(S const&) &&;
+};
+
+void
+test_pr122661()
+{
+  std::forward_list<S> fl;
+  S* iter = nullptr;
+  fl.assign(iter, iter);
+}