diff --git a/libnetutil/netutil.cc b/libnetutil/netutil.cc
index 5258016f2..bcd7e0d0c 100644
--- a/libnetutil/netutil.cc
+++ b/libnetutil/netutil.cc
@@ -553,10 +553,11 @@ unsigned short in_cksum(u16 *ptr,int nbytes) {
 }
 
 
-/* For computing TCP/UDP checksums, see RFC 1071 and TCP/IP Illustrated
-   sections 3.2, 11.3, and 17.3. */
-unsigned short tcpudp_cksum(const struct in_addr *src, const struct in_addr *dst,
-                            u8 proto, u16 len, const void *hstart){
+/* Calculate the Internet checksum of some given data concatentated with the
+   IPv4 pseudo-header. See RFC 1071 and TCP/IP Illustrated sections 3.2, 11.3,
+   and 17.3. */
+unsigned short ipv4_pseudoheader_cksum(const struct in_addr *src,
+  const struct in_addr *dst, u8 proto, u16 len, const void *hstart) {
   struct pseudo {
     struct in_addr src;
     struct in_addr dst;
diff --git a/libnetutil/netutil.h b/libnetutil/netutil.h
index c177aa05b..8b59d3e7b 100644
--- a/libnetutil/netutil.h
+++ b/libnetutil/netutil.h
@@ -183,10 +183,11 @@ int arp_cache_set(struct sockaddr_storage *ss, u8 *mac);
 /* Standard BSD internet checksum routine. */
 unsigned short in_cksum(u16 *ptr, int nbytes);
 
-/* For computing TCP/UDP checksums, see RFC 1071 and TCP/IP Illustrated
-   sections 3.2, 11.3, and 17.3.*/
-unsigned short tcpudp_cksum(const struct in_addr *src, const struct in_addr *dst,
-                            u8 proto, u16 len, const void *hstart);
+/* Calculate the Internet checksum of some given data concatentated with the
+   IPv4 pseudo-header. See RFC 1071 and TCP/IP Illustrated sections 3.2, 11.3,
+   and 17.3. */
+unsigned short ipv4_pseudoheader_cksum(const struct in_addr *src,
+  const struct in_addr *dst, u8 proto, u16 len, const void *hstart);
 
 void sethdrinclude(int sd);
 void set_ipoptions(int sd, void *opts, size_t optslen);
diff --git a/osscan2.cc b/osscan2.cc
index 245157d2a..607278879 100644
--- a/osscan2.cc
+++ b/osscan2.cc
@@ -2995,7 +2995,7 @@ int HostOsScan::send_closedudp_probe(HostOsScanStats *hss,
     udp->uh_ulen = htons(8 + datalen);
 
     /* OK, now we should be able to compute a valid checksum */
-    realcheck = tcpudp_cksum(source, hss->target->v4hostip(), IPPROTO_UDP,
+    realcheck = ipv4_pseudoheader_cksum(source, hss->target->v4hostip(), IPPROTO_UDP,
 				   sizeof(struct udp_hdr) + datalen, (char *) udp);
 #if STUPID_SOLARIS_CHECKSUM_BUG
     udp->uh_sum = sizeof(struct udp_hdr) + datalen;