diff --git a/aio/content/guide/dependency-injection-providers.md b/aio/content/guide/dependency-injection-providers.md
index 1c074ce501..c171be3a71 100644
--- a/aio/content/guide/dependency-injection-providers.md
+++ b/aio/content/guide/dependency-injection-providers.md
@@ -278,7 +278,7 @@ When you provide multiple sets of routes using [RouterModule.forRoot](api/router
 and [RouterModule.forChild](api/router/RouterModule#forchild) in a single module,
 the [ROUTES](api/router/ROUTES) token combines all the different provided sets of routes into a single value.
 
-<div class="alert is-helpful>
+<div class="alert is-helpful">
 
 Search for [Constants in API documentation](api?type=const) to find more built-in tokens.