diff --git a/Source/Glide64/Util.cpp b/Source/Glide64/Util.cpp
index ce7d25fa5..b710261bb 100644
--- a/Source/Glide64/Util.cpp
+++ b/Source/Glide64/Util.cpp
@@ -37,6 +37,7 @@
 //
 //****************************************************************
 
+#include <math.h>
 #include "Gfx_1.3.h"
 #include "Util.h"
 #include "Combine.h"