diff --git a/docs/deployment/koyeb.md b/docs/deployment/koyeb.md
index 9ff87350be..3e30881752 100644
--- a/docs/deployment/koyeb.md
+++ b/docs/deployment/koyeb.md
@@ -26,7 +26,7 @@ backend:
   listen:
     # The $PORT environment variable is a feature of Koyeb
     # https://www.koyeb.com/docs/apps/services
-    port: ${PORT]
+    port: ${PORT}
 ```
 
 ## Push and deploy Backstage to Koyeb