diff --git a/board/mx1fs2/flash.c b/board/mx1fs2/flash.c
index 3806310..47885bc 100644
--- a/board/mx1fs2/flash.c
+++ b/board/mx1fs2/flash.c
@@ -173,7 +173,7 @@
 	int i;
 	uchar *boottype;
 	uchar *bootletter;
-	uchar *fmt;
+	char *fmt;
 	uchar botbootletter[] = "B";
 	uchar topbootletter[] = "T";
 	uchar botboottype[] = "bottom boot sector";