1 files changed, 2 insertions, 2 deletions
diff --git a/lib/zlib.js b/lib/zlib.js
index d3aa858fba..dc0aeca304 100644
--- a/lib/zlib.js
+++ b/lib/zlib.js
@@ -309,7 +309,7 @@ Zlib.prototype.reset = function reset() {
 };
 
 Zlib.prototype._flush = function(callback) {
-  this._transform(null, callback);
+  this._transform(null, '', callback);
 };
 
 Zlib.prototype.flush = function(callback) {
@@ -343,7 +343,7 @@ Zlib.prototype.close = function(callback) {
   });
 };
 
-Zlib.prototype._transform = function(chunk, cb) {
+Zlib.prototype._transform = function(chunk, encoding, cb) {
   var flushFlag;
   var ws = this._writableState;
   var ending = ws.ending || ws.ended;