diff --git a/lib/server/pipe.js b/lib/server/pipe.js
index be5471da..8a60ae61 100644
--- a/lib/server/pipe.js
+++ b/lib/server/pipe.js
@@ -25,7 +25,8 @@
      * @param callback - function(error) {}
      */
     function create(read, write, options, callback) {
-        var gzip, isFsWrite,
+        var gzip,
+            isFsWrite       = write instanceof fs.WriteStream,
             isStrRead       = type.string(read),
             isStrWrite      = type.string(write),
             isFunc          = type.function(options),