diff --git a/desmume/src/utils/decrypt/crc.h b/desmume/src/utils/decrypt/crc.h
index 2af2fe6e9..62745a5b2 100644
--- a/desmume/src/utils/decrypt/crc.h
+++ b/desmume/src/utils/decrypt/crc.h
@@ -31,6 +31,7 @@
 
 //#include "little.h"		// FixCrc is not yet big endian compatible
 #include <stdio.h>
+#include <string.h>
 
 /*
  * Data