diff --git a/lib/corereqs.js b/lib/corereqs.js
index bb20e7c..83f4922 100644
--- a/lib/corereqs.js
+++ b/lib/corereqs.js
@@ -765,13 +765,9 @@ var templates = {
            var vals = packValueMask('CreateGC', values);
            var packetLength = 3 + (values ? vals[2].length : 0);
            var args = [56, packetLength, cid];
-           args.push(vals[0]);     // values bitmask
-           var valArr = vals[1];
-           for (var v in valArr)
-           {
-               format += 'L'; // TODO: we know format string length in advance and += inefficient for string
-               args.push(valArr[v]);
-           }
+           format += vals[0]
+           args.push(vals[1]);     // values bitmask
+           args = args.concat(vals[2])
            return [format, args];
         }
    ],