diff --git a/plugins/caddy-vhosts/internal-functions b/plugins/caddy-vhosts/internal-functions
index 86727e364..88758f732 100755
--- a/plugins/caddy-vhosts/internal-functions
+++ b/plugins/caddy-vhosts/internal-functions
@@ -71,3 +71,8 @@ fn-caddy-tls-internal() {
   declare APP="$1"
   fn-plugin-property-get-default "caddy" "$APP" "tls-internal" "false"
 }
+
+fn-caddy-label-key() {
+  declare APP="$1"
+  fn-plugin-property-get-default "caddy" "$APP" "label-key" "caddy"
+}