diff --git a/ui/devcmd.c b/ui/devcmd.c
index 973aa0b..1a0c95e 100644
--- a/ui/devcmd.c
+++ b/ui/devcmd.c
@@ -75,7 +75,7 @@ int cmd_md(char **arg)
 				len_text);
 			return -1;
 		}
-	} else if (offset + length > 0x10000) {
+	} else if (offset < 0x10000 && offset + length > 0x10000) {
 		length = 0x10000 - offset;
 	}