diff --git a/CHANGELOG b/CHANGELOG
index 345665406..bd595d9e0 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,5 +1,10 @@
 # Nmap Changelog ($Id$); -*-text-*-
 
+o Version 4.85BETA4 had a bug in the implementation of the new SEQ.CI
+  test that could cause a closed-port IP ID to be written into the
+  array for the SEQ.TI test and cause erroneous results. The bug was
+  found and fixed by Guillaume Prigent.
+
 o Nbase has grown routines for calculating Adler32 and CRC32C
   checksums. [Daniel Roethlisberger]
 
diff --git a/osscan2.cc b/osscan2.cc
index f86ce0e2f..e2ca1718a 100644
--- a/osscan2.cc
+++ b/osscan2.cc
@@ -1826,7 +1826,7 @@ void HostOsScan::makeTSeqFP(HostOsScanStats *hss) {
     
     if (hss->ipid.tcp_closed_ipids[i] != -1) {
       if (good_tcp_closed_ipid_num < i) {
-        hss->ipid.tcp_ipids[good_tcp_closed_ipid_num] = hss->ipid.tcp_closed_ipids[i];
+        hss->ipid.tcp_closed_ipids[good_tcp_closed_ipid_num] = hss->ipid.tcp_closed_ipids[i];
       }
       good_tcp_closed_ipid_num++;
     }