diff --git a/kernel/fork.c b/kernel/fork.c
index 6ca8689a83b5..bb86c57cc0d9 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1596,7 +1596,7 @@ static int copy_files(unsigned long clone_flags, struct task_struct *tsk,
 	return 0;
 }
 
-static int copy_sighand(unsigned long clone_flags, struct task_struct *tsk)
+static int copy_sighand(u64 clone_flags, struct task_struct *tsk)
 {
 	struct sighand_struct *sig;