diff --git a/opensips.spec b/opensips.spec
index 2f62f75..0064dbf 100644
--- a/opensips.spec
+++ b/opensips.spec
@@ -557,9 +557,7 @@ rm -rf $RPM_BUILD_ROOT
 
 %post
 /sbin/chkconfig --add opensips
-cp /etc/opensips/opensips.cfg.withxlog
-/bin/sed '/^\s*loadmodule\s*\"xlog.so\"/d' /etc/opensips/opensips.cfg.withxlog > \
- /etc/opensips/opensips.cfg
+/bin/sed -i".withxlog" '/^\s*loadmodule\s*\"xlog.so\"/d' /etc/opensips/opensips.cfg
 
 %preun
 if [ $1 = 0 ]; then