diff --git a/corosync.spec b/corosync.spec
index ea90baf..d64cc13 100644
--- a/corosync.spec
+++ b/corosync.spec
@@ -54,6 +54,7 @@ BuildRoot:      %{_tmppath}/%{name}-%{version}-build
 # openais is indeed gone and should be uninstalled. No, we do not
 # provide openais on purpose, the package has been deleted.
 Obsoletes:      openais
+Conflicts:      openais
 # Runtime bits
 Requires:       libcorosync4 = %{version}-%{release}
 #Requires(pre): /usr/sbin/useradd