diff --git a/lib/nodegen.js b/lib/nodegen.js
index b234164..cb9cc32 100644
--- a/lib/nodegen.js
+++ b/lib/nodegen.js
@@ -177,7 +177,7 @@ function function2node(data, options) {
 
         if (options.tgz) {
             runNpmPack(data);
-            return path.join(data.dst, data.module + '-' + data.version) + '.tgz';
+            return path.join(data.dst, data.module + '-' + data.version + '.tgz');
         } else {
             return path.join(data.dst, data.module);
         }
@@ -424,7 +424,7 @@ function swagger2node(data, options) {
 
     if (options.tgz) {
         runNpmPack(data);
-        return path.join(data.dst, data.module + '-' + data.version) + '.tgz';
+        return path.join(data.dst, data.module + '-' + data.version + '.tgz');
     } else {
         return path.join(data.dst, data.module);
     }