diff --git a/lib/x11/corereqs.js b/lib/x11/corereqs.js
index 2fc6c0b..96495fb 100644
--- a/lib/x11/corereqs.js
+++ b/lib/x11/corereqs.js
@@ -187,6 +187,14 @@ module.exports = {
        }   
    ],
 
+   QueryPointer: [
+       [ 'CxSL', [38, 2] ],
+       function(buf) {
+           var res = buf.unpack('LLSSSSS');  // TODO: should be unsigned
+           return res;
+       }
+   ],
+
    // opcode 55
    CreateGC: [
        function(cid, drawable, values) {