diff --git a/src/core/ddsi/include/ddsi/ddsi_ipaddr.h b/src/core/ddsi/include/ddsi/ddsi_ipaddr.h
index 0fa1b44..35bdc44 100644
--- a/src/core/ddsi/include/ddsi/ddsi_ipaddr.h
+++ b/src/core/ddsi/include/ddsi/ddsi_ipaddr.h
@@ -16,6 +16,7 @@
 
 enum ddsi_nearby_address_result ddsi_ipaddr_is_nearby_address (ddsi_tran_factory_t tran, const nn_locator_t *loc, size_t ninterf, const struct nn_interface interf[]);
 enum ddsi_locator_from_string_result ddsi_ipaddr_from_string (ddsi_tran_factory_t tran, nn_locator_t *loc, const char *str, int32_t kind);
+int ddsi_ipaddr_compare (const os_sockaddr *const sa1, const os_sockaddr *const sa2);
 char *ddsi_ipaddr_to_string (ddsi_tran_factory_t tran, char *dst, size_t sizeof_dst, const nn_locator_t *loc, int with_port);
 void ddsi_ipaddr_to_loc (nn_locator_t *dst, const os_sockaddr *src, int32_t kind);
 void ddsi_ipaddr_from_loc (os_sockaddr_storage *dst, const nn_locator_t *src);
diff --git a/src/core/ddsi/src/ddsi_ipaddr.c b/src/core/ddsi/src/ddsi_ipaddr.c
index 96766da..fb8a69e 100644
--- a/src/core/ddsi/src/ddsi_ipaddr.c
+++ b/src/core/ddsi/src/ddsi_ipaddr.c
@@ -16,6 +16,40 @@
 #include "ddsi/q_nwif.h"
 #include "ddsi/q_config.h"
 
+int ddsi_ipaddr_compare (const os_sockaddr *const sa1, const os_sockaddr *const sa2)
+{
+  int eq;
+  size_t sz;
+
+  if ((eq = sa1->sa_family - sa2->sa_family) == 0) {
+    switch(sa1->sa_family) {
+#if (OS_SOCKET_HAS_IPV6 == 1)
+      case AF_INET6: {
+        os_sockaddr_in6 *sin61, *sin62;
+        sin61 = (os_sockaddr_in6 *)sa1;
+        sin62 = (os_sockaddr_in6 *)sa2;
+        sz = sizeof(sin61->sin6_addr);
+        eq = memcmp(&sin61->sin6_addr, &sin62->sin6_addr, sz);
+        break;
+      }
+#endif /* OS_SOCKET_HAS_IPV6 */
+      case AF_INET: {
+        os_sockaddr_in *sin1, *sin2;
+        sin1 = (os_sockaddr_in *)sa1;
+        sin2 = (os_sockaddr_in *)sa2;
+        sz = sizeof(sin1->sin_addr);
+        eq = memcmp(&sin1->sin_addr, &sin2->sin_addr, sizeof(sz));
+        break;
+      }
+      default: {
+        assert(0);
+      }
+    }
+  }
+
+  return eq;
+}
+
 enum ddsi_nearby_address_result ddsi_ipaddr_is_nearby_address (ddsi_tran_factory_t tran, const nn_locator_t *loc, size_t ninterf, const struct nn_interface interf[])
 {
   os_sockaddr_storage tmp, iftmp, nmtmp, ownip;
@@ -29,7 +63,7 @@ enum ddsi_nearby_address_result ddsi_ipaddr_is_nearby_address (ddsi_tran_factory
     ddsi_ipaddr_from_loc(&ownip, &gv.ownloc);
     if (os_sockaddrSameSubnet ((os_sockaddr *) &tmp, (os_sockaddr *) &iftmp, (os_sockaddr *) &nmtmp))
     {
-      if (os_sockaddr_compare((os_sockaddr *)&iftmp, (os_sockaddr *)&ownip) == 0)
+      if (ddsi_ipaddr_compare((os_sockaddr *)&iftmp, (os_sockaddr *)&ownip) == 0)
         return DNAR_SAME;
       else
         return DNAR_LOCAL;
diff --git a/src/core/ddsi/src/ddsi_tcp.c b/src/core/ddsi/src/ddsi_tcp.c
index b2b1f9e..b4ac620 100644
--- a/src/core/ddsi/src/ddsi_tcp.c
+++ b/src/core/ddsi/src/ddsi_tcp.c
@@ -91,8 +91,7 @@ static int ddsi_tcp_cmp_conn (const ddsi_tcp_conn_t c1, const ddsi_tcp_conn_t c2
    return (a1s->sa_family < a2s->sa_family) ? -1 : 1;
   else if (c1->m_peer_port != c2->m_peer_port)
     return (c1->m_peer_port < c2->m_peer_port) ? -1 : 1;
-
-  return os_sockaddr_compare(a1s, a2s);
+  return ddsi_ipaddr_compare (a1s, a2s);
 }
 
 typedef struct ddsi_tcp_node
diff --git a/src/os/include/os/os_socket.h b/src/os/include/os/os_socket.h
index 511c1b4..24a67b3 100644
--- a/src/os/include/os/os_socket.h
+++ b/src/os/include/os/os_socket.h
@@ -271,24 +271,6 @@ extern "C" {
     OSAPI_EXPORT uint16_t
     os_sockaddr_get_port(const os_sockaddr *const sa) __nonnull_all__;
 
-    /**
-    * Compare two IP addresses for equality - does not consider port number.
-    * This is a 'straight' compare i.e. family must match and address bytes
-    * must correspond. It does not consider the possibility of IPv6 mapped
-    * IPv4 addresses or anything arcane like that.
-    * @param sa1 First socket address
-    * @param sa2 Second socket address.
-    * @return true if equal, false otherwise.
-    * @return Integer less than, equal to, or greater than zero if sa1 is
-    *         found, respectively, to be less than, to match, or be greater
-    *         than sa2.
-    * @pre both sa1 and sa2 are valid os_sockaddr pointers.
-    */
-    OSAPI_EXPORT int
-    os_sockaddr_compare(
-        const os_sockaddr *const sa1,
-        const os_sockaddr *const sa2) __nonnull_all__ __attribute_pure__;
-
     /**
      * Check if IP address of given socket address is unspecified.
      * @param sa Socket address
diff --git a/src/os/src/os_socket.c b/src/os/src/os_socket.c
index 5cb7b71..b6525f0 100644
--- a/src/os/src/os_socket.c
+++ b/src/os/src/os_socket.c
@@ -104,7 +104,7 @@ uint16_t os_sockaddr_get_port(const os_sockaddr *const sa)
     return port;
 }
 
-int os_sockaddr_compare(
+static int os_sockaddr_compare(
     const os_sockaddr *const sa1,
     const os_sockaddr *const sa2)
 {
@@ -142,7 +142,7 @@ int os_sockaddr_compare(
                 sin1 = (os_sockaddr_in *)sa1;
                 sin2 = (os_sockaddr_in *)sa2;
                 sz = sizeof(sin1->sin_addr);
-                eq = memcmp(sin1, sin2, sizeof(*sin1));
+                eq = memcmp(&sin1->sin_addr, &sin2->sin_addr, sizeof(sz));
             }
                 break;
         }