diff --git a/docs/http/prometheus.conf b/docs/http/prometheus.conf
index ad1204e..47d15e9 100644
--- a/docs/http/prometheus.conf
+++ b/docs/http/prometheus.conf
@@ -7,7 +7,7 @@
 js_import /usr/share/nginx-plus-module-prometheus/prometheus.js;
 
 server {
-    listen 9113:
+    listen 9113;
     status_zone prometheus;
 
     location = /metrics {