diff --git a/scripts/wsrep_sst_rsync.sh b/scripts/wsrep_sst_rsync.sh
index 23ee3df5d40..7acdf87b660 100644
--- a/scripts/wsrep_sst_rsync.sh
+++ b/scripts/wsrep_sst_rsync.sh
@@ -357,18 +357,18 @@ EOF
 
     readonly RSYNC_PORT=${WSREP_SST_OPT_PORT:-4444}
     # If the IP is local listen only in it
-    if is_local_ip $RSYNC_ADDR
+    if is_local_ip "$RSYNC_ADDR"
     then
-      rsync --daemon --no-detach --address $RSYNC_ADDR --port $RSYNC_PORT --config "$RSYNC_CONF" &
+      rsync --daemon --no-detach --address "$RSYNC_ADDR" --port "$RSYNC_PORT" --config "$RSYNC_CONF" &
     else
       # Not local, possibly a NAT, listen in all interface
-      rsync --daemon --no-detach --port $RSYNC_PORT --config "$RSYNC_CONF" &
+      rsync --daemon --no-detach --port "$RSYNC_PORT" --config "$RSYNC_CONF" &
       # Overwrite address with all
       RSYNC_ADDR="*"
     fi
     RSYNC_REAL_PID=$!
 
-    until check_pid_and_port $RSYNC_PID $RSYNC_REAL_PID $RSYNC_ADDR $RSYNC_PORT
+    until check_pid_and_port "$RSYNC_PID" "$RSYNC_REAL_PID" "$RSYNC_ADDR" "$RSYNC_PORT"
     do
         sleep 0.2
     done