diff --git a/app/steps/decorateUserRes.js b/app/steps/decorateUserRes.js
index 9c53a709..d1edf530 100644
--- a/app/steps/decorateUserRes.js
+++ b/app/steps/decorateUserRes.js
@@ -9,7 +9,9 @@ function isResGzipped(res) {
 
 function zipOrUnzip(method) {
   return function(rspData, res) {
-    return (isResGzipped(res)) ? zlib[method](rspData) : rspData;
+    return (isResGzipped(res)) ? zlib[method](rspData, {
+      finishFlush: zlib.constants.Z_SYNC_FLUSH
+    }) : rspData;
   };
 }