diff --git a/spec/namespaces/cluster.yaml b/spec/namespaces/cluster.yaml
index cf71a3c8..bf23cdae 100644
--- a/spec/namespaces/cluster.yaml
+++ b/spec/namespaces/cluster.yaml
@@ -1401,7 +1401,7 @@ components:
     cluster.stats::path.index_metric:
       in: path
       name: index_metric
-      description:  A comma-separated list of index metric groups, for example, `docs,store`.
+      description: A comma-separated list of index metric groups, for example, `docs,store`.
       required: true
       schema:
         type: array