diff --git a/CHANGELOG b/CHANGELOG
index 7a4a36f24..fa626f07b 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,5 +1,10 @@
 # Nmap Changelog ($Id$); -*-text-*-
 
+o Increased hop distance estimates from OS detection by one. The
+  distance now counts the number of hops including the final one to
+  the target, not just the number of intermediate nodes. The IPv6
+  distance calculation already worked this way. [David]
+
 Nmap 5.61TEST2 [2011-09-30]
 
 o Added IPv6 OS detection system! The new system utilizes many tests
diff --git a/osscan2.cc b/osscan2.cc
index e0b307f98..508c4eeec 100644
--- a/osscan2.cc
+++ b/osscan2.cc
@@ -3059,7 +3059,7 @@ bool HostOsScan::processTUdpResp(HostOsScanStats *hss, struct ip *ip) {
 
   /* Count hop count */
   if (hss->distance == -1) {
-    hss->distance = this->udpttl - ip2->ip_ttl;
+    hss->distance = this->udpttl - ip2->ip_ttl + 1;
   }
 
   return true;