diff --git a/designs/cache_options.md b/designs/cache_options.md
index 767834a591..ddb5914371 100644
--- a/designs/cache_options.md
+++ b/designs/cache_options.md
@@ -135,7 +135,7 @@ Options{
     &corev1.ConfgMap{}: {
       Namespaces: map[string]*cache.CacheSetting{
         "": {},                                    // No selector for all namespaces...
-        "operator" {LabelSelector: labelSelector}, // except for the operator namespace
+        "operator": {LabelSelector: labelSelector}, // except for the operator namespace
       },
     },
   },