diff --git a/docs/Cube.js-Backend/Real-Time-Data-Fetch.md b/docs/Cube.js-Backend/Real-Time-Data-Fetch.md
index 5b876038dc3a2..4bde1d9ff2806 100644
--- a/docs/Cube.js-Backend/Real-Time-Data-Fetch.md
+++ b/docs/Cube.js-Backend/Real-Time-Data-Fetch.md
@@ -76,6 +76,10 @@ const Chart = ({ query }) => {
     return <pre>{error.toString()}</pre>;
   }
   
+  if (!resultSet) {
+    return null;
+  }
+  
   return <LineChart resultSet={resultSet}/>;
 };
 ```