--- a/usr/lib/byobu/updates_available
+++ b/usr/lib/byobu/updates_available
@@ -67,9 +67,16 @@ ___update_cache() {
 	elif eval $BYOBU_TEST pacman >/dev/null; then
 		# If pacman (Archlinux) exists, use it
 		LC_ALL=C flock -xn "$flock" pacman -Sup | grep -vc "^\(::\| \)" >$mycache 2>/dev/null &
+	elif eval $BYOBU_TEST opkg >/dev/null; then
+		# If opkg (OpenWrt) exists, use it, also background if flock exists
+		if eval $BYOBU_TEST flock >/dev/null; then
+			flock -xn "$flock" opkg list-upgradable | wc -l >$mycache 2>/dev/null &
+		else
+			opkg list-upgradable | wc -l >$mycache &
+		fi
 	elif eval $BYOBU_TEST brew >/dev/null; then
 		# If homebrew (Mac OSX) exists, use it, also background if flock exists
-		if eval $BYOBU_TEST flock; then
+		if eval $BYOBU_TEST flock >/dev/null; then
 			flock -xn "$flock" brew outdated | wc -l >$mycache 2>/dev/null &
 		else
 			brew outdated | wc -l >$mycache &
@@ -106,6 +113,18 @@ ___update_needed() {
 			[ "$db" -nt "$mycache" ] && return 0
 		done
 		return 1
+	elif eval $BYOBU_TEST opkg >/dev/null; then
+		# OpenWrt
+		[ ! -e /var/lock/opkg.lock ] || return 1
+		if [ -d /var/opkg-lists ]; then
+			[ /var/opkg-lists -nt "$mycache" ]
+			return $?
+		else
+			local u s
+			read u s < "$mycache"
+			[ "$u" -gt 0 ]
+			return $?
+		fi
 	elif eval $BYOBU_TEST brew >/dev/null; then
 		# Mac OSX
 		# check if any new versions have been installed since