diff --git a/services/redis.nix b/services/redis.nix
index 3cf92f0..f557c31 100644
--- a/services/redis.nix
+++ b/services/redis.nix
@@ -42,7 +42,7 @@ let
           ''
         else
           ''
-            echo "Starting redis on port ${port}"
+            echo "Starting redis on port ${builtins.toString port}"
           ''
       }
       export REDISDATA