diff --git a/java/res/values/attrs.xml b/java/res/values/attrs.xml
index 815c7fd..64a4c9f 100644
--- a/java/res/values/attrs.xml
+++ b/java/res/values/attrs.xml
@@ -132,7 +132,15 @@
     </declare-styleable>
 
     <declare-styleable name="BaseKeyboard_Case">
-        <attr name="mode" format="string" />
+        <!-- This should be matched with KeyboardSwitcher.MODE_* -->
+        <attr name="mode">
+            <flag name="text" value="0" />
+            <flag name="url" value="1" />
+            <flag name="email" value="2" />
+            <flag name="im" value="3" />
+            <flag name="web" value="4" />
+            <flag name="phone" value="5" />
+        </attr>
         <attr name="settingsKey" format="string" />
         <attr name="voiceKey" format="string" />
     </declare-styleable>