diff --git a/drivers/net/mmnif.c b/drivers/net/mmnif.c
index 3ba716c9..d8d471cc 100644
--- a/drivers/net/mmnif.c
+++ b/drivers/net/mmnif.c
@@ -86,7 +86,7 @@ static int active = 0;
 
 /* decide wheter it's uses locking or not
  */
-static int disable_locking = 1;
+static int disable_locking = 0;
 
 /* decide whether deliver work to a worker thread or instantly process all packets
  */