diff --git a/tools/make_tarball.py b/tools/make_tarball.py
index bceaf10..dd5fc90 100755
--- a/tools/make_tarball.py
+++ b/tools/make_tarball.py
@@ -8,8 +8,6 @@ import shutil
 
 from  toollib import *
 
-c('python update_revnum.py')
-
 execfile('../IPython/Release.py')  # defines version_base
 
 ver = version_info()