diff --git a/briar-gtk/data/ui/main_window.ui b/briar-gtk/data/ui/main_window.ui
index 459aa2d612bfcc21d28c0ddbe5aa9fb8fbb91f14..35c978b483ef0bf20bdb26575fb66fe461343e8d 100644
--- a/briar-gtk/data/ui/main_window.ui
+++ b/briar-gtk/data/ui/main_window.ui
@@ -85,6 +85,7 @@
         <child>
           <object class="GtkOverlay" id="main_content_container">
             <property name="visible">True</property>
+            <property name="hexpand">True</property>
             <property name="can_focus">False</property>
             <child>
               <object class="GtkStack" id="main_content_stack">