diff --git a/lcl/interfaces/cocoa/cocoawsstdctrls.pas b/lcl/interfaces/cocoa/cocoawsstdctrls.pas
index d37a125901..ca52f449d2 100644
--- a/lcl/interfaces/cocoa/cocoawsstdctrls.pas
+++ b/lcl/interfaces/cocoa/cocoawsstdctrls.pas
@@ -1987,7 +1987,8 @@ begin
     Exit;
   if not ADroppedDown then exit;
   comboBox:= TCocoaComboBox(ACustomComboBox.Handle);
-  comboBox.cell.performSelector_withObject_afterDelay( ObjCSelector('moveDown:'), nil, 0 );
+  if comboBox.cell.respondsToSelector(ObjCSelector('moveDown:')) then
+    comboBox.cell.performSelector_withObject_afterDelay( ObjCSelector('moveDown:'), nil, 0 );
 end;