Index: include/__hash_table
===================================================================
--- include/__hash_table
+++ include/__hash_table
@@ -825,7 +825,8 @@
 
     allocator_type& __na_;
 
-    __hash_node_destructor& operator=(const __hash_node_destructor&);
+    __hash_node_destructor& operator=(const __hash_node_destructor&)
+        _LIBCPP_EQUAL_DELETE;
 
 public:
     bool __value_constructed;
Index: include/__tree
===================================================================
--- include/__tree
+++ include/__tree
@@ -775,7 +775,8 @@
     typedef __tree_node_types<pointer> _NodeTypes;
     allocator_type& __na_;
 
-    __tree_node_destructor& operator=(const __tree_node_destructor&);
+    __tree_node_destructor& operator=(const __tree_node_destructor&)
+        _LIBCPP_EQUAL_DELETE;
 
 public:
     bool __value_constructed;