diff --git a/qemu-options.hx b/qemu-options.hx
index 310885c60e..65147ad971 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -4696,24 +4696,24 @@ SRST
         tools such as tcpdump or Wireshark.
 
     ``-object colo-compare,id=id,primary_in=chardevid,secondary_in=chardevid,outdev=chardevid,iothread=id[,vnet_hdr_support][,notify_dev=id][,compare_timeout=@var{ms}][,expired_scan_cycle=@var{ms}][,max_queue_size=@var{size}]``
-        Colo-compare gets packet from primary\_inchardevid and
-        secondary\_inchardevid, than compare primary packet with
-        secondary packet. If the packets are same, we will output
-        primary packet to outdevchardevid, else we will notify
-        colo-frame do checkpoint and send primary packet to
-        outdevchardevid. In order to improve efficiency, we need to put
-        the task of comparison in another thread. If it has the
-        vnet\_hdr\_support flag, colo compare will send/recv packet with
-        vnet\_hdr\_len. Then compare\_timeout=@var{ms} determines the
-        maximum delay colo-compare wait for the packet.
-        The expired\_scan\_cycle=@var{ms} to set the period of scanning
-        expired primary node network packets. The max\_queue\_size=@var{size}
-        is to set the max compare queue size depend on user environment.
-        If you want to use Xen COLO, will need the notify\_dev to
+        Colo-compare gets packet from primary\_in chardevid and
+        secondary\_in, then compare whether the payload of primary packet
+        and secondary packet are the same. If same, it will output
+        primary packet to out\_dev, else it will notify COLO-framework to do
+        checkpoint and send primary packet to out\_dev. In order to
+        improve efficiency, we need to put the task of comparison in
+        another iothread. If it has the vnet\_hdr\_support flag,
+        colo compare will send/recv packet with vnet\_hdr\_len.
+        The compare\_timeout=@var{ms} determines the maximum time of the
+        colo-compare hold the packet. The expired\_scan\_cycle=@var{ms}
+        is to set the period of scanning expired primary node network packets.
+        The max\_queue\_size=@var{size} is to set the max compare queue
+        size depend on user environment.
+        If user want to use Xen COLO, need to add the notify\_dev to
         notify Xen colo-frame to do checkpoint.
 
-        we must use it with the help of filter-mirror and
-        filter-redirector.
+        COLO-compare must be used with the help of filter-mirror,
+        filter-redirector and filter-rewriter.
 
         ::