diff --git a/samba.changes b/samba.changes
index 28630eb..8316e21 100644
--- a/samba.changes
+++ b/samba.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Tue Aug  8 12:58:56 UTC 2017 - dmulder@suse.com
+
+- Fix duplicate CTDB_LOGGING params when downgraded and upgraded again;
+  (bsc#1048339).
+
 -------------------------------------------------------------------
 Mon Jul 24 13:34:55 UTC 2017 - ddiss@suse.com
 
diff --git a/samba.spec b/samba.spec
index 11cd528..f1ef370 100644
--- a/samba.spec
+++ b/samba.spec
@@ -1628,7 +1628,8 @@ fi
 %service_add_pre ctdb.service
 %endif
 if [ -e %{_sysconfdir}/sysconfig/ctdb ] ; then
-	sed -i s/CTDB_LOGFILE=/CTDB_LOGGING=file:/g %{_sysconfdir}/sysconfig/ctdb
+    grep CTDB_LOGGING %{_sysconfdir}/sysconfig/ctdb >/dev/null 2>&1 ||
+    	sed -i s/CTDB_LOGFILE=/CTDB_LOGGING=file:/g %{_sysconfdir}/sysconfig/ctdb
 fi
 
 %preun -n ctdb