diff --git a/libcxx/include/string b/libcxx/include/string
index 469e3dd507ba..b3bc58e7aca7 100644
--- a/libcxx/include/string
+++ b/libcxx/include/string
@@ -1033,7 +1033,9 @@ public:
     basic_string(const basic_string& __str);
     basic_string(const basic_string& __str, const allocator_type& __a);
 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
+    _LIBCPP_INLINE_VISIBILITY
     basic_string(basic_string&& __str);
+    _LIBCPP_INLINE_VISIBILITY
     basic_string(basic_string&& __str, const allocator_type& __a);
 #endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
     _LIBCPP_INLINE_VISIBILITY basic_string(const_pointer __s);