diff --git a/libcxx/include/__config b/libcxx/include/__config
index 19377b17b120..e00416b45633 100644
--- a/libcxx/include/__config
+++ b/libcxx/include/__config
@@ -909,7 +909,7 @@ extern "C" void __sanitizer_annotate_contiguous_container(
 #endif
 
 _LIBCPP_BEGIN_NAMESPACE_STD
-_LIBCPP_FUNC_VIS _LIBCPP_WEAK int __libcpp_library_version();
+_LIBCPP_FUNC_VIS _LIBCPP_WEAK extern "C++" int __libcpp_library_version();
 _LIBCPP_END_NAMESPACE_STD
 
 #define _LIBCPP_LIBRARY_VERSION \