--- lazarus/ide/include/unix/lazbaseconf.inc
+++ lazarus/ide/include/unix/lazbaseconf.inc
@@ -180,7 +180,7 @@
 
 function GetDefaultLCLWidgetType: string;
 begin
-  Result:='gtk';
+  Result:='gtk2';
 end;
 
 procedure GetDefaultBrowser(var Browser, Params: string);