diff --git a/tutorials/gui/gtreeTableTest.C b/tutorials/gui/gtreeTableTest.C
index 76e9151fbc7aab3cf923587d65a3775660efabdd..d358d402a21b0862fbd5e7858f6809ceef236f38 100644
--- a/tutorials/gui/gtreeTableTest.C
+++ b/tutorials/gui/gtreeTableTest.C
@@ -87,7 +87,7 @@ TableTest::TableTest(const TGWindow *p, UInt_t ntrows, UInt_t ntcols,
    SetWindowName("TGTreeTable Test") ;
    MapSubwindows() ;
    Layout();
-   Resize() ;
+   Resize(GetDefaultWidth()+20, 600) ;
    MapWindow() ;
    
 } ;