diff --git a/nixos/modules/services/monitoring/grafana-image-renderer.nix b/nixos/modules/services/monitoring/grafana-image-renderer.nix
index 60f6e84c63c7..7ea17b07567c 100644
--- a/nixos/modules/services/monitoring/grafana-image-renderer.nix
+++ b/nixos/modules/services/monitoring/grafana-image-renderer.nix
@@ -108,7 +108,7 @@ in {
 
     services.grafana.settings.rendering = mkIf cfg.provisionGrafana {
       url = "http://localhost:${toString cfg.settings.service.port}/render";
-      callback_url = "http://localhost:${toString config.services.grafana.port}";
+      callback_url = "http://localhost:${toString config.services.grafana.settings.server.http_port}";
     };
 
     services.grafana-image-renderer.chromium = mkDefault pkgs.chromium;