diff --git a/Gruntfile.js b/Gruntfile.js
index 9fb641f34..ccb49ed52 100644
--- a/Gruntfile.js
+++ b/Gruntfile.js
@@ -63,7 +63,8 @@ module.exports = function(grunt) {
 
     uglify: {
       options: {
-        banner: '<%= banner %>'
+        banner: '<%= banner %>',
+        report: 'min'
       },
       bootstrap: {
         src: ['<%= concat.bootstrap.dest %>'],
@@ -217,4 +218,4 @@ module.exports = function(grunt) {
     var files = getFiles('js') + getFiles('less') + getFiles('fonts')
     fs.writeFileSync('assets/js/raw-files.js', files)
   });
-};
\ No newline at end of file
+};
diff --git a/assets/js/jszip.js b/assets/js/jszip.js
index 037818903..4be4e6a40 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: