diff --git a/tests/scripts/test048-syncrepl-multiproxy b/tests/scripts/test048-syncrepl-multiproxy
index fbff911a63..2bb5629939 100755
--- a/tests/scripts/test048-syncrepl-multiproxy
+++ b/tests/scripts/test048-syncrepl-multiproxy
@@ -119,7 +119,7 @@ if test $RC != 0 ; then
 fi
 
 echo "Starting R1 slave slapd on TCP/IP port $PORT3..."
-. $CONFFILTER $BACKEND $MONITORDB < $RSLAVECONF | sed -e 's;\.2\.;.3.;' > $CONF3
+. $CONFFILTER $BACKEND $MONITORDB < $RSLAVECONF | sed -e 's;\.2\.\([^/]*\)$;.3.\1;' > $CONF3
 $SLAPD -f $CONF3 -h $URI3 -d $LVL $TIMING > $LOG3 2>&1 &
 R1SLAVEPID=$!
 if test $WAIT != 0 ; then