diff --git a/doc/plugin_event_list.md b/doc/plugin_event_list.md
index 0f5ee225..c7f9e059 100644
--- a/doc/plugin_event_list.md
+++ b/doc/plugin_event_list.md
@@ -82,6 +82,7 @@ myPlugin.on('addTopBar', function(callback) {
 		}
 	}
 	});
+	callback(btnList);
 });
 ```
 
diff --git a/doc/plugin_event_list_CN.md b/doc/plugin_event_list_CN.md
index b03dc0d7..feb89410 100644
--- a/doc/plugin_event_list_CN.md
+++ b/doc/plugin_event_list_CN.md
@@ -90,6 +90,7 @@ myPlugin.on('addTopBar', function(callback) {
 		}
 	}
 	});
+	callback(btnList);
 });
 ```