diff --git a/package/mtd/src/mtd.c b/package/mtd/src/mtd.c
index 5fa260b91a..a7d4c1b857 100644
--- a/package/mtd/src/mtd.c
+++ b/package/mtd/src/mtd.c
@@ -45,6 +45,10 @@
 #include "fis.h"
 #include "mtd.h"
 
+#ifndef MTDREFRESH
+#define MTDREFRESH	_IO('M', 50)
+#endif
+
 #define MAX_ARGS 8
 #define JFFS2_DEFAULT_DIR	"" /* directory name without /, empty means root dir */