diff --git a/kernel/futex.c b/kernel/futex.c
index 1c33711..794c862 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -299,7 +299,7 @@ void put_futex_key(int fshared, union futex_key *key)
 static int fault_in_user_writeable(u32 __user *uaddr)
 {
 	int ret = get_user_pages(current, current->mm, (unsigned long)uaddr,
-				 sizeof(*uaddr), 1, 0, NULL, NULL);
+				 1, 1, 0, NULL, NULL);
 	return ret < 0 ? ret : 0;
 }