diff --git a/docs/store-devtools/README.md b/docs/store-devtools/README.md
index 1703f108aa..bea5578cd7 100644
--- a/docs/store-devtools/README.md
+++ b/docs/store-devtools/README.md
@@ -31,7 +31,7 @@ import { environment } from '../environments/environment'; // Angular CLI enviro
     StoreModule.forRoot(reducers),
     // Instrumentation must be imported after importing StoreModule (config is optional)
     StoreDevtoolsModule.instrument({
-      maxAge: 25 // Retains last 25 states,
+      maxAge: 25, // Retains last 25 states
       logOnly: environment.production // Restrict extension to log-only mode
     })
   ]