diff --git a/src/types.h b/src/types.h
index 8cb607f6..2ca34f8d 100644
--- a/src/types.h
+++ b/src/types.h
@@ -24,6 +24,7 @@
 
 #ifdef _MSC_VER
 #include <windows.h>
+#include <intrin.h>
 #endif
 
 #endif // #ifndef KERNEL