diff --git a/VERSION b/VERSION
index 9d472ba4..2d46ead0 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-Version 2.6.0-development+timestamp.2013.07.16.05.17.59
+Version 2.6.0-development+timestamp.2013.07.16.13.14.21
diff --git a/gluon/main.py b/gluon/main.py
index 30316c14..1fa2a027 100644
--- a/gluon/main.py
+++ b/gluon/main.py
@@ -172,7 +172,7 @@ def copystream_progress(request, chunk_size=10 ** 5):
         size = int(env.content_length)
     except ValueError:
         raise HTTP(400, "Invalid Content-Length header")
-    dest = tempfile.TemporaryFile()
+    dest = tempfile.NamedTemporaryFile()
     if not 'X-Progress-ID' in request.vars:
         copystream(source, dest, size, chunk_size)
         return dest