diff --git a/Services/Style/Content/classes/class.ilContentStylesTableGUI.php b/Services/Style/Content/classes/class.ilContentStylesTableGUI.php
index 73092c9046d5..04bbaeaee236 100644
--- a/Services/Style/Content/classes/class.ilContentStylesTableGUI.php
+++ b/Services/Style/Content/classes/class.ilContentStylesTableGUI.php
@@ -154,7 +154,7 @@ protected function fillRow(array $a_set) : void
             $this->tpl->setVariable(
                 "SCOPE",
                 ilObject::_lookupTitle(
-                    ilObject::_lookupObjId($a_set["category"])
+                    ilObject::_lookupObjId((int) $a_set["category"])
                 )
             );
         }