diff --git a/src/devices/nm-device-bridge.c b/src/devices/nm-device-bridge.c
index 6eb9850e45..e05d4d7a10 100644
--- a/src/devices/nm-device-bridge.c
+++ b/src/devices/nm-device-bridge.c
@@ -380,6 +380,7 @@ commit_option (NMDevice *device, NMSetting *setting, const Option *option, gbool
 			break;
 		default:
 			nm_assert_not_reached ();
+			value = NULL;
 			break;
 	}