diff --git a/src/devices/nm-device-dummy.c b/src/devices/nm-device-dummy.c
index c05cc5681a..10975d262d 100644
--- a/src/devices/nm-device-dummy.c
+++ b/src/devices/nm-device-dummy.c
@@ -135,13 +135,11 @@ check_connection_compatible (NMDevice *device, NMConnection *connection)
 }
 
 static NMActStageReturn
-act_stage1_prepare (NMDevice *device, NMDeviceStateReason *reason)
+act_stage1_prepare (NMDevice *device, NMDeviceStateReason *out_failure_reason)
 {
 	NMActStageReturn ret;
 
-	g_return_val_if_fail (reason != NULL, NM_ACT_STAGE_RETURN_FAILURE);
-
-	ret = NM_DEVICE_CLASS (nm_device_dummy_parent_class)->act_stage1_prepare (device, reason);
+	ret = NM_DEVICE_CLASS (nm_device_dummy_parent_class)->act_stage1_prepare (device, out_failure_reason);
 	if (ret != NM_ACT_STAGE_RETURN_SUCCESS)
 		return ret;