diff --git a/src/devices/nm-device.c b/src/devices/nm-device.c
index 24b201efc8..b51e9b0dbf 100644
--- a/src/devices/nm-device.c
+++ b/src/devices/nm-device.c
@@ -4237,7 +4237,7 @@ nm_device_set_is_nm_owned (NMDevice *device,
 {
 	NMDevicePrivate *priv;
 
-	g_return_if_fail (NM_IS_DEVICE (device));
+	g_return_val_if_fail (NM_IS_DEVICE (device), FALSE);
 
 	priv = NM_DEVICE_GET_PRIVATE (device);
 
@@ -4249,7 +4249,6 @@ nm_device_set_is_nm_owned (NMDevice *device,
 	return TRUE;
 }
 
-
 /*
  * nm_device_deactivate
  *