Please fix typo in spec

diff --git a/python-paste-deploy.spec b/python-paste-deploy.spec
index 9a7da16..5284bc3 100644
--- a/python-paste-deploy.spec
+++ b/python-paste-deploy.spec
@@ -29,7 +29,7 @@ URIs; these URIs can refer to Python Eggs for INI-style configuration
 files.  PasteScript provides commands to serve applications based on
 this configuration file.
 
-%if 0%{with_python3}
+%if 0%{?with_python3}
 %package -n python3-paste-deploy
 Summary:        Load, configure, and compose WSGI applications and servers
 Group:          System Environment/Libraries