diff --git a/administrator/components/com_categories/models/categories.php b/administrator/components/com_categories/models/categories.php
index 34964f2ccedfa..f09c653f170ad 100644
--- a/administrator/components/com_categories/models/categories.php
+++ b/administrator/components/com_categories/models/categories.php
@@ -305,7 +305,7 @@ protected function getListQuery()
 			);
 
 		// Load Helper file of the component for which com_categories displays the categories
-		$classname = ucfirst(substr($extension, 4)) . 'Helper';
+		$classname = ucfirst(str_replace('.', '', substr($extension, 4))) . 'Helper';
 
 		if (class_exists($classname) && method_exists($classname, 'countItems'))
 		{