diff --git a/mach/proto/ncg/types.h b/mach/proto/ncg/types.h
index 53e1194ed..e00189c3f 100644
--- a/mach/proto/ncg/types.h
+++ b/mach/proto/ncg/types.h
@@ -25,3 +25,6 @@ typedef char * string;
 #endif
 
 #define word long
+#ifndef WRD_FMT
+#define WRD_FMT "%ld"
+#endif WRD_FMT