diff --git a/gramps/plugins/tool/finddupes.glade b/gramps/plugins/tool/finddupes.glade
index 7ec9a6f3a..e1ad72b23 100644
--- a/gramps/plugins/tool/finddupes.glade
+++ b/gramps/plugins/tool/finddupes.glade
@@ -338,7 +338,7 @@
             </child>
           </object>
           <packing>
-            <property name="expand">False</property>
+            <property name="expand">True</property>
             <property name="fill">True</property>
             <property name="position">1</property>
           </packing>