diff --git a/desmume/src/utils/colorspacehandler/colorspacehandler_SSE2.cpp b/desmume/src/utils/colorspacehandler/colorspacehandler_SSE2.cpp
index 1c1394858..1a85b6d10 100644
--- a/desmume/src/utils/colorspacehandler/colorspacehandler_SSE2.cpp
+++ b/desmume/src/utils/colorspacehandler/colorspacehandler_SSE2.cpp
@@ -17,6 +17,8 @@
 
 #include "colorspacehandler_SSE2.h"
 
+#include <string.h>
+
 #ifndef ENABLE_SSE2
 	#error This code requires SSE2 support.
 #else