diff --git a/app/ui/main_window.glade b/app/ui/main_window.glade
index 1bf38910..8028a27b 100644
--- a/app/ui/main_window.glade
+++ b/app/ui/main_window.glade
@@ -1747,6 +1747,18 @@ Author: Dmitriy Yefremov
                     <property name="position">1</property>
                   </packing>
                 </child>
+                <child>
+                  <object class="GtkSeparator" id="top_separator">
+                    <property name="visible">True</property>
+                    <property name="can_focus">False</property>
+                    <property name="margin_top">1</property>
+                  </object>
+                  <packing>
+                    <property name="expand">False</property>
+                    <property name="fill">True</property>
+                    <property name="position">2</property>
+                  </packing>
+                </child>
                 <child>
                   <object class="GtkPaned" id="main_data_paned">
                     <property name="width_request">320</property>