diff --git a/rbutil/rbutilqt/gui/backupdialogfrm.ui b/rbutil/rbutilqt/gui/backupdialogfrm.ui
index 5de61d1e91..c7bf5f262b 100644
--- a/rbutil/rbutilqt/gui/backupdialogfrm.ui
+++ b/rbutil/rbutilqt/gui/backupdialogfrm.ui
@@ -2,6 +2,9 @@
 <ui version="4.0">
  <class>BackupDialog</class>
  <widget class="QDialog" name="BackupDialog">
+ <property name="windowModality">
+   <enum>Qt::WindowModal</enum>
+  </property>
   <property name="geometry">
    <rect>
     <x>0</x>