diff --git a/samples/propgrid/propgrid.xrc b/samples/propgrid/propgrid.xrc
index ef9f22e612..7135f75a58 100644
--- a/samples/propgrid/propgrid.xrc
+++ b/samples/propgrid/propgrid.xrc
@@ -7,6 +7,7 @@
         <object class="sizeritem">
             <option>1</option>
             <flag>wxEXPAND</flag>
+            <minsize>400,500</minsize>
             <object class="wxPropertyGridManager">
                 <style>wxPG_AUTO_SORT|wxPG_TOOLTIPS|wxPG_TOOLBAR</style>
                 <exstyle>wxPG_EX_MODE_BUTTONS|wxPG_EX_HELP_AS_TOOLTIPS</exstyle>