diff --git a/python-zope.interface.spec b/python-zope.interface.spec
index d7ed02e..5b0ded9 100644
--- a/python-zope.interface.spec
+++ b/python-zope.interface.spec
@@ -22,7 +22,7 @@ Version:        3.8.0
 Release:        0
 Url:            http://pypi.python.org/pypi/zope.interface
 Summary:        Interfaces for Python
-License:        ZPL 2.1
+License:        ZPL-2.1
 Group:          Development/Languages/Python
 Source:         http://pypi.python.org/packages/source/z/zope.interface/zope.interface-%{version}.tar.gz
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build