diff --git a/src/ce_interfaces.pas b/src/ce_interfaces.pas
index c40ec101..bfe14f0f 100644
--- a/src/ce_interfaces.pas
+++ b/src/ce_interfaces.pas
@@ -168,7 +168,7 @@ type
   TOptionEditorKind = (oekGeneric, oekForm, oekControl);
   // event generated by the option editor and passed to an ICEEditableOptions.
   // the oeeChange event only happends if the container is oekGeneric.
-  TOptionEditorEvent = (oeeCancel, oeeAccept, oeeChange);
+  TOptionEditorEvent = (oeeCancel, oeeAccept, oeeChange, oeeSelectCat);
   (**
    * An implementer can expose some options to be edited in a dedicated widget.
    *)
diff --git a/src/ce_optionseditor.pas b/src/ce_optionseditor.pas
index 5849f3df..8666407b 100644
--- a/src/ce_optionseditor.pas
+++ b/src/ce_optionseditor.pas
@@ -174,6 +174,10 @@ begin
         inspector.TIObject := dt^.container;
       end;
   end;
+  //
+  PCategoryData(selCat.Selected.Data)^
+    .observer
+    .optionedEvent(oeeSelectCat);
 end;
 
 procedure TCEOptionEditorWidget.inspectorModified(Sender: TObject);