diff --git a/collects/scribblings/gui/win-overview.scrbl b/collects/scribblings/gui/win-overview.scrbl
index 84a55aa032..5bb75cfd8b 100644
--- a/collects/scribblings/gui/win-overview.scrbl
+++ b/collects/scribblings/gui/win-overview.scrbl
@@ -355,8 +355,8 @@ with the following program:
                                      [alignment '(center center)]))
 
 (code:comment #, @t{Add @onscreen{Cancel} and @onscreen{Ok} buttons to the horizontal panel})
-(new button% [parent parent] [label "Cancel"])
-(new button% [parent parent] [label "Ok"])
+(new button% [parent panel] [label "Cancel"])
+(new button% [parent panel] [label "Ok"])
 
 (code:comment #, @t{Show the dialog})
 (send dialog #,(:: dialog% show) #t)