diff --git a/package/network/utils/comgt/files/3g.sh b/package/network/utils/comgt/files/3g.sh
index 2ed74b4c08..2dc719b2ca 100644
--- a/package/network/utils/comgt/files/3g.sh
+++ b/package/network/utils/comgt/files/3g.sh
@@ -9,7 +9,7 @@ proto_3g_init_config() {
 	no_device=1
 	available=1
 	ppp_generic_init_config
-	proto_config_add_string "device"
+	proto_config_add_string "device:device"
 	proto_config_add_string "apn"
 	proto_config_add_string "service"
 	proto_config_add_string "pincode"