diff --git a/mainwindow.ui b/mainwindow.ui
index 0038b4a1..f56702c7 100644
--- a/mainwindow.ui
+++ b/mainwindow.ui
@@ -73,6 +73,9 @@
          <height>16777215</height>
         </size>
        </property>
+       <property name="autoFillBackground">
+        <bool>true</bool>
+       </property>
        <property name="tabPosition">
         <enum>QTabWidget::North</enum>
        </property>