diff --git a/lib/x11/corereqs.js b/lib/x11/corereqs.js
index 4a9ed5f..6fcab01 100644
--- a/lib/x11/corereqs.js
+++ b/lib/x11/corereqs.js
@@ -388,9 +388,9 @@ module.exports = {
    
    SetInputFocus: [
 
-      function (wid)
+      function (wid, revertTo) // revertTo: 0 - None, 1 - PointerRoot, 2 - Parent
       {
-          return [ 'CCSLL', [42, 0, 3, wid, 0] ];
+          return [ 'CCSLL', [42, revertTo, 3, wid, 0] ];
       }
    ],