diff --git a/Source/GlideHQ/TxCache.cpp b/Source/GlideHQ/TxCache.cpp
index bef6ecf6b..378f57ab9 100644
--- a/Source/GlideHQ/TxCache.cpp
+++ b/Source/GlideHQ/TxCache.cpp
@@ -25,6 +25,8 @@
 #pragma warning(disable: 4786)
 #endif
 
+#include <string.h> /* memcpy, memset */
+
 #include "TxCache.h"
 #include "TxDbg.h"
 #include <zlib/zlib.h>