diff --git a/assets/javascripts/discourse/templates/docs-index.hbs b/assets/javascripts/discourse/templates/docs-index.hbs
index 5b93a41..a5573e5 100644
--- a/assets/javascripts/discourse/templates/docs-index.hbs
+++ b/assets/javascripts/discourse/templates/docs-index.hbs
@@ -22,6 +22,7 @@
                   checked=(readonly filterSolved)
                   change=(action "onChangeFilterSolved" value="target.checked")
                 }}
+                {{plugin-outlet name="custom-checkbox"}}
                 {{i18n "docs.filter_solved"}}
               </label>
             </div>