diff --git a/lib/generator.py b/lib/generator.py
index 0f16e2f..94824f7 100755
--- a/lib/generator.py
+++ b/lib/generator.py
@@ -305,7 +305,7 @@ this script the next time")
                     target_file.write(response.raw.read())
             else:
                 raise requests.HTTPError("Download failed: HTTP " +
-                    response.status_code + " " + response.reason)
+                    str(response.status_code) + " " + response.reason)
         return abs_file_name
 
     def get_packages(self):