diff --git a/res/values/themes.xml b/res/values/themes.xml
index 40de27438..5d4e8ad6b 100644
--- a/res/values/themes.xml
+++ b/res/values/themes.xml
@@ -49,6 +49,7 @@
     </style>
 
     <style name="Theme.K9.Dark.Base" parent="Theme.Sherlock">
+        <item name="android:windowBackground">@android:color/black</item>
         <item name="iconFolder">@drawable/folder_dark</item>
         <item name="listDivider">@drawable/divider_dark</item>
         <item name="iconListItemMenu">@drawable/dropdown_ic_arrow_normal_holo_dark</item>