diff --git a/CHANGELOG b/CHANGELOG
index d5e3f8e1c..b0bf1113d 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,5 +1,9 @@
 # Nmap Changelog ($Id$); -*-text-*-
 
+o Fixed a bug which caused Nmap to infer an improper distance against
+  some hosts when performaing OS detection against a group whose
+  distance varies between members. [David, Fyodor]
+
 o Added a new NSE OpenSSL library with functions for multiprecision
   integer arithmetics, hashing, HMAC, symmetric encryption and symmetric
   decryption. [Sven]
diff --git a/osscan2.cc b/osscan2.cc
index 4a5fb279d..c6e99cc38 100644
--- a/osscan2.cc
+++ b/osscan2.cc
@@ -3659,7 +3659,7 @@ static void endRound(OsScanInfo *OSI, HostOsScan *HOS, int roundNum) {
 
   for(hostI = OSI->incompleteHosts.begin(); 
       hostI != OSI->incompleteHosts.end(); hostI++) {
-
+    distance = -1;
     hsi = *hostI;
     HOS->makeFP(hsi->hss);