diff --git a/lib/corereqs.js b/lib/corereqs.js
index 4ee6bb2..b798f9a 100644
--- a/lib/corereqs.js
+++ b/lib/corereqs.js
@@ -775,7 +775,7 @@ var templates = {
 
           // TODO: move code to calculate reqLength and use BigReq if needed outside of corereq.js
           // NOTE: big req is used here (first 'L' in format, 0 and +1 in params), won't work if not enabled
-          return [ 'CCSLLLSSssCCxxaa', [72, format, 0, reqLen, drawable, gc, width, height, dstX, dstY, leftPad, depth, data, pad]];
+          return [ 'CCSLLLSSssCCxxaa', [72, format, 0, 1+reqLen, drawable, gc, width, height, dstX, dstY, leftPad, depth, data, pad]];
           // return [ 'CCSLLLSSssCCxxaa', [72, format, 0, 1+reqLen, drawable, gc, width, height, dstX, dstY, leftPad, depth, data, pad]];
       }
    ],
@@ -791,7 +791,7 @@ var templates = {
            return {
                depth: depth,
                visualId: visualId,
-               data: buf.slice(20)
+               data: buf.slice(24)
            };
        }
    ],