diff --git a/gns3server/compute/docker/resources/bin/udhcpc b/gns3server/compute/docker/resources/bin/udhcpc
index fe1410a6..16c064d0 100644
--- a/gns3server/compute/docker/resources/bin/udhcpc
+++ b/gns3server/compute/docker/resources/bin/udhcpc
@@ -1,8 +1,15 @@
 #!/gns3/bin/busybox sh
 
 SCRIPT="/gns3/etc/udhcpc/default.script"
-EXTRA=""
 
-[ "$(cat "/proc/$PPID/comm" 2>/dev/null)" = ifup ] && EXTRA="-t 3 -T 2 -A 1 -b"
+if [ "$(cat "/proc/$PPID/comm" 2>/dev/null)" = ifup ]; then
+	# remove "-n" argument
+	for arg do
+		shift
+		[ "$arg" = "-n" ] || set -- "$@" "$arg"
+	done
+	# add default parameters
+	set -- -t 3 -T 2 -A 1 -b "$@"
+fi
 
-exec /tmp/gns3/bin/udhcpc -s "$SCRIPT" $EXTRA "$@"
+exec /tmp/gns3/bin/udhcpc -s "$SCRIPT" "$@"