diff --git a/[refs] b/[refs]
index ec0057a5c8c0..fe72e73f6156 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: bc1978d404befacd272d0321ef749cc3192e488b
+refs/heads/master: b6557fbca805217588a412f391a65ceafcf1a1af
diff --git a/trunk/kernel/posix-timers.c b/trunk/kernel/posix-timers.c
index 197208b3aa2a..3b606d361b52 100644
--- a/trunk/kernel/posix-timers.c
+++ b/trunk/kernel/posix-timers.c
@@ -290,7 +290,8 @@ void do_schedule_next_timer(struct siginfo *info)
 		info->si_overrun = timr->it_overrun_last;
 	}
 
-	unlock_timer(timr, flags);
+	if (timr)
+		unlock_timer(timr, flags);
 }
 
 int posix_timer_event(struct k_itimer *timr,int si_private)