diff --git a/kernel/futex_compat.c b/kernel/futex_compat.c
index 338a9b4..2747894 100644
--- a/kernel/futex_compat.c
+++ b/kernel/futex_compat.c
@@ -144,20 +144,21 @@
 	struct timespec ts;
 	ktime_t t, *tp = NULL;
 	int val2 = 0;
+	int cmd = op & FUTEX_CMD_MASK;
 
-	if (utime && (op == FUTEX_WAIT || op == FUTEX_LOCK_PI)) {
+	if (utime && (cmd == FUTEX_WAIT || cmd == FUTEX_LOCK_PI)) {
 		if (get_compat_timespec(&ts, utime))
 			return -EFAULT;
 		if (!timespec_valid(&ts))
 			return -EINVAL;
 
 		t = timespec_to_ktime(ts);
-		if (op == FUTEX_WAIT)
+		if (cmd == FUTEX_WAIT)
 			t = ktime_add(ktime_get(), t);
 		tp = &t;
 	}
-	if (op == FUTEX_REQUEUE || op == FUTEX_CMP_REQUEUE
-	    || op == FUTEX_CMP_REQUEUE_PI)
+	if (cmd == FUTEX_REQUEUE || cmd == FUTEX_CMP_REQUEUE
+	    || cmd == FUTEX_CMP_REQUEUE_PI)
 		val2 = (int) (unsigned long) utime;
 
 	return do_futex(uaddr, op, val, tp, uaddr2, val2, val3);