diff --git a/desmume/src/types.h b/desmume/src/types.h
index 9b613f3ad..c51d4b5ed 100644
--- a/desmume/src/types.h
+++ b/desmume/src/types.h
@@ -84,4 +84,8 @@ typedef int BOOL;
 #define FALSE 0
 #endif
 
+#ifdef __GNUC__
+#define PACKED __attribute__((packed))
+#endif
+
 #endif