diff --git a/product/ERP5/spec/build-spec b/product/ERP5/spec/build-spec
index 60c0737129ac59f6c3aedb708a7ce689d0d651bf..87f9f9f63abc718bf2bf1d0c1d35eac42954e1f4 100755
--- a/product/ERP5/spec/build-spec
+++ b/product/ERP5/spec/build-spec
@@ -128,6 +128,7 @@ URL:       http://www.erp5.org
 Source0:   %{product}-%{version}.tar.bz2
 BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-rootdir
 BuildArch: noarch
+Conflicts: $NAME
 $REQUIRES
 
 #----------------------------------------------------------------------