diff --git a/java/res/values/attrs.xml b/java/res/values/attrs.xml
index c5c6326..8ee859b 100644
--- a/java/res/values/attrs.xml
+++ b/java/res/values/attrs.xml
@@ -483,6 +483,8 @@
         <attr name="localeCode" format="string" />
         <attr name="languageCode" format="string" />
         <attr name="countryCode" format="string" />
+        <!-- Enable split keyboard layout. Disabled by default. -->
+        <attr name="isSplitLayout" format="boolean" />
     </declare-styleable>
 
     <declare-styleable name="Keyboard_KeyStyle">