diff --git a/Source/Project64-rsp-core/RSPInfo.cpp b/Source/Project64-rsp-core/RSPInfo.cpp
index e4180ca12..3b66e9617 100644
--- a/Source/Project64-rsp-core/RSPInfo.cpp
+++ b/Source/Project64-rsp-core/RSPInfo.cpp
@@ -12,6 +12,7 @@
 
 #if defined(_MSC_VER)
 #include <Windows.h>
+#include <intrin.h>
 #endif
 
 RSP_INFO RSPInfo;