diff --git a/lib/corereqs.js b/lib/corereqs.js
index b40fbcb..5019882 100644
--- a/lib/corereqs.js
+++ b/lib/corereqs.js
@@ -481,6 +481,21 @@ module.exports = {
            };
        }
    ],
+   
+   TranslateCoordinates: [
+       function(srcWid, dstWid, srcX, srcY) {
+           return [ 'CxSLLSS', [ 40, 4, srcWid, dstWid, srcX, srcY ] ];
+       },
+       function(buf)
+       {
+           var res = buf.unpack('LSS');
+           ext = {};
+           ext.child = res[0];
+           ext.destX = res[1];
+           ext.destY = res[2];
+           return ext;
+       }
+   ],
 
    SetInputFocus: [