diff --git a/Lib/idlelib/configDialog.py b/Lib/idlelib/configDialog.py
index 3aa66721005..f5388178e0e 100644
--- a/Lib/idlelib/configDialog.py
+++ b/Lib/idlelib/configDialog.py
@@ -1389,7 +1389,7 @@ class VerticalScrolledFrame(Frame):
         vscrollbar = Scrollbar(self, orient=VERTICAL)
         vscrollbar.pack(fill=Y, side=RIGHT, expand=FALSE)
         canvas = Canvas(self, bd=0, highlightthickness=0,
-                        yscrollcommand=vscrollbar.set)
+                        yscrollcommand=vscrollbar.set, width=240)
         canvas.pack(side=LEFT, fill=BOTH, expand=TRUE)
         vscrollbar.config(command=canvas.yview)