diff --git a/data/gui/single_message_window.ui b/data/gui/single_message_window.ui
index 42c1c4d41..c7c704cce 100644
--- a/data/gui/single_message_window.ui
+++ b/data/gui/single_message_window.ui
@@ -140,7 +140,7 @@
             </child>
           </object>
           <packing>
-            <property name="expand">False</property>
+            <property name="expand">True</property>
             <property name="fill">True</property>
             <property name="position">1</property>
           </packing>