diff --git a/CHANGELOG b/CHANGELOG
index c63069851..645b065da 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,5 +1,9 @@
 # Nmap Changelog ($Id$); -*-text-*-
 
+o Fixed a compile error on NetBSD. It was
+    tcpip.cc:2948: error: pointer of type 'void *' used in arithmetic
+  Thanks to Jay Fink for reporting the problem and submitting a patch.
+
 o [Zenmap] If you have any hosts or services selected, they will
   remain selected after aggregating another scan or running a filter
   (as long as they are still up and visible). Before the selection was
diff --git a/tcpip.cc b/tcpip.cc
index be4ac1dee..17af30b4d 100644
--- a/tcpip.cc
+++ b/tcpip.cc
@@ -3037,7 +3037,7 @@ static struct interface_info *getinterfaces_siocgifconf(int *howmany) {
   ifr = ifc.ifc_req;
 
   for (ifr = ifc.ifc_req;
-       ifr && ifr->ifr_name[0] && (void *) ifr < ifc.ifc_buf + ifc.ifc_len;
+       ifr && ifr->ifr_name[0] && (void *) ifr < (char *) ifc.ifc_buf + ifc.ifc_len;
        ifr = (struct ifreq *) ((char *) ifr + len)) {
     struct sockaddr_in *sin;
     struct ifreq tmpifr;