diff --git a/kernel/exception.c b/kernel/exception.c
index 123995807..d3c7810c5 100755
--- a/kernel/exception.c
+++ b/kernel/exception.c
@@ -54,7 +54,6 @@ unsigned vec_nr;
   }
 
   if (k_reenter == 0 && ! istaskp(saved_proc)) {
-	unlock(7);		/* this is protected like sys_call() */
 	cause_sig(proc_nr(saved_proc), ep->signum);
 	return;
   }