diff --git a/src/material-examples/autocomplete-optgroup/autocomplete-optgroup-example.ts b/src/material-examples/autocomplete-optgroup/autocomplete-optgroup-example.ts
index 75e0e13cec2..862f4009735 100644
--- a/src/material-examples/autocomplete-optgroup/autocomplete-optgroup-example.ts
+++ b/src/material-examples/autocomplete-optgroup/autocomplete-optgroup-example.ts
@@ -18,6 +18,7 @@ export const _filter = (opt: string[], value: string): string[] => {
  * @title Option groups autocomplete
  */
 @Component({
+  selector: 'autocomplete-optgroup-example',
   templateUrl: './autocomplete-optgroup-example.html',
   styleUrls: ['./autocomplete-optgroup-example.css'],
 })