Fix usage of __revision__.
diff --git a/pefile.py b/pefile.py
index cf01a6d..c07bbc1 100644
--- a/pefile.py
+++ b/pefile.py
@@ -22,7 +22,7 @@
 
 __revision__ = "63"
 __author__ = 'Ero Carrera'
-__version__ = '1.2.10-%d' % int( __revision__[21:-2] )
+__version__ = '1.2.10-%d' % int( __revision__ )
 __contact__ = 'ero.carrera@gmail.com'