diff --git a/drivers/message/fusion/mptctl.c b/drivers/message/fusion/mptctl.c
index 3d555b7..b4967bb 100644
--- a/drivers/message/fusion/mptctl.c
+++ b/drivers/message/fusion/mptctl.c
@@ -140,7 +140,7 @@
  * Event Handler function
  */
 static int mptctl_event_process(MPT_ADAPTER *ioc, EventNotificationReply_t *pEvReply);
-struct fasync_struct *async_queue=NULL;
+static struct fasync_struct *async_queue=NULL;
 
 /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
 /*