diff --git a/gtk/resources/ui/gtkmessagedialog.ui b/gtk/resources/ui/gtkmessagedialog.ui
index 44d280b0a2..d75a414b62 100644
--- a/gtk/resources/ui/gtkmessagedialog.ui
+++ b/gtk/resources/ui/gtkmessagedialog.ui
@@ -26,13 +26,13 @@
             <property name="visible">True</property>
             <property name="can_focus">False</property>
             <property name="border_width">0</property>
-            <property name="spacing">12</property>
+            <property name="margin_start">30</property>
+            <property name="margin_end">30</property>
+            <property name="spacing">30</property>
             <child>
               <object class="GtkBox" id="message_area">
                 <property name="visible">True</property>
                 <property name="can_focus">False</property>
-                <property name="margin_start">30</property>
-                <property name="margin_end">30</property>
                 <property name="orientation">vertical</property>
                 <property name="spacing">10</property>
                 <child>