diff --git a/llvm/lib/Support/xxhash.cpp b/llvm/lib/Support/xxhash.cpp
index a0803297555ce..8e1763809bf01 100644
--- a/llvm/lib/Support/xxhash.cpp
+++ b/llvm/lib/Support/xxhash.cpp
@@ -46,6 +46,9 @@
 #include "llvm/Support/Endian.h"
 
 #include <stdlib.h>
+#if defined(_MSC_VER) && defined(_M_IX86)
+#include <intrin.h>
+#endif
 
 using namespace llvm;
 using namespace support;