diff --git a/assets/js/jszip.js b/assets/js/jszip.js
index 0378189038..4be4e6a40a 100644
--- a/assets/js/jszip.js
+++ b/assets/js/jszip.js
@@ -659,7 +659,7 @@ JSZip.prototype = (function () {
             if ( !this.files.hasOwnProperty(name) ) { continue; }
             var file = this.files[name];
 
-            var compressionName = file.compression || options.compression.toUpperCase();
+            var compressionName = file.options.compression || options.compression.toUpperCase();
             var compression = JSZip.compressions[compressionName];
             if (!compression) {
                throw new Error(compressionName + " is not a valid compression method !");
@@ -1422,4 +1422,4 @@ JSZip.base64 = (function() {
 }());
 
 // enforcing Stuk's coding style
-// vim: set shiftwidth=3 softtabstop=3:
\ No newline at end of file
+// vim: set shiftwidth=3 softtabstop=3: