diff --git a/drivers/net/mmnif.c b/drivers/net/mmnif.c
index bdc8c1af..5da13007 100644
--- a/drivers/net/mmnif.c
+++ b/drivers/net/mmnif.c
@@ -80,7 +80,7 @@ static int active = 0;
 
 /* decide wheter it's uses locking or not
  */
-static int disable_locking = 1;
+static int disable_locking = 0;
 
 /* IP address of the local core and the router core to get packets forwarded
  */