diff --git a/user_guide/general/controllers.html b/user_guide/general/controllers.html
index 49f8e58..db488c5 100644
--- a/user_guide/general/controllers.html
+++ b/user_guide/general/controllers.html
@@ -398,6 +398,7 @@
 <li>_ci_autoloader</li>
 <li>_ci_init_class</li>
 <li>_ci_init_scaffolding</li>
+<li>_ci_is_instance</li>
 <li>_ci_load</li>
 <li>_ci_load_class</li>
 <li>_ci_object_to_array</li>