diff --git a/drivers/net/mmnif.c b/drivers/net/mmnif.c
index ed702f3f..616652cc 100644
--- a/drivers/net/mmnif.c
+++ b/drivers/net/mmnif.c
@@ -85,7 +85,7 @@ 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
  */