diff --git a/stable/xdg-shell/xdg-shell.xml b/stable/xdg-shell/xdg-shell.xml
index 39ecf8a..06d855a 100644
--- a/stable/xdg-shell/xdg-shell.xml
+++ b/stable/xdg-shell/xdg-shell.xml
@@ -460,6 +460,7 @@
     </description>
 
     <enum name="error">
+      <entry name="role" value="0" summary="Surface already has another role"/>
       <entry name="not_constructed" value="1"
 	     summary="Surface was not fully constructed"/>
       <entry name="already_constructed" value="2"