diff --git a/src/devices/nm-device-tun.c b/src/devices/nm-device-tun.c
index 4002ef0cf5..978c1bace3 100644
--- a/src/devices/nm-device-tun.c
+++ b/src/devices/nm-device-tun.c
@@ -50,7 +50,6 @@ enum {
 	PROP_0,
 	PROP_OWNER,
 	PROP_GROUP,
-	PROP_FLAGS,
 	PROP_MODE,
 	PROP_NO_PI,
 	PROP_VNET_HDR,