diff --git a/lib/corereqs.js b/lib/corereqs.js
index a386d64..72349ad 100644
--- a/lib/corereqs.js
+++ b/lib/corereqs.js
@@ -489,7 +489,7 @@ module.exports = {
        function(buf)
        {
            var res = buf.unpack('Lss');
-           ext = {};
+           var ext = {};
            ext.child = res[0];
            ext.destX = res[1];
            ext.destY = res[2];