diff --git a/clang/lib/Headers/Intrin.h b/clang/lib/Headers/Intrin.h
index 9f186f7..e219109 100644
--- a/clang/lib/Headers/Intrin.h
+++ b/clang/lib/Headers/Intrin.h
@@ -393,6 +393,8 @@
                                                  __int64);
 __int64 _InterlockedCompareExchange64_np(__int64 volatile *_Destination,
                                          __int64 _Exchange, __int64 _Comparand);
+void *_InterlockedCompareExchangePointer(void *volatile *_Destination,
+                                         void *_Exchange, void *_Comparand);
 void *_InterlockedCompareExchangePointer_np(void *volatile *_Destination,
                                             void *_Exchange, void *_Comparand);
 __int64 _InterlockedDecrement64(__int64 volatile *_Addend);