diff --git a/squashfs-root/lib/functions.sh b/squashfs-root/lib/functions.sh
index 0d4b2a3..4d28b17 100755
--- a/squashfs-root/lib/functions.sh
+++ b/squashfs-root/lib/functions.sh
@@ -221,3 +221,10 @@ user_exists() {
 }
 
 [ -z "$IPKG_INSTROOT" -a -f /lib/config/uci.sh ] && . /lib/config/uci.sh
+
+default_postinst() {
+	return 0
+}
+default_prerm() {
+	return 0
+}