diff --git a/aio/content/tutorial/toh-pt6.md b/aio/content/tutorial/toh-pt6.md
index aa65f928f1..83c84422d7 100644
--- a/aio/content/tutorial/toh-pt6.md
+++ b/aio/content/tutorial/toh-pt6.md
@@ -191,7 +191,7 @@ give it a `catchError()` operator.
   region="getHeroes-2" >
 </code-example>
 
-The `catchError()` operator intercepts an **`Observable that failed**.
+The `catchError()` operator intercepts an **`Observable` that failed**.
 It passes the error an _error handler_ that can do what it wants with the error.
 
 The following `handleError()` method reports the error and then returns an