diff --git a/src/core/ngx_cycle.c b/src/core/ngx_cycle.c
index 96345192a..86ed9a6da 100644
--- a/src/core/ngx_cycle.c
+++ b/src/core/ngx_cycle.c
@@ -11,7 +11,6 @@
 
 
 static void ngx_destroy_cycle_pools(ngx_conf_t *conf);
-static ngx_int_t ngx_cmp_sockaddr(struct sockaddr *sa1, struct sockaddr *sa2);
 static ngx_int_t ngx_init_zone_pool(ngx_cycle_t *cycle,
     ngx_shm_zone_t *shm_zone);
 static ngx_int_t ngx_test_lockfile(u_char *file, ngx_log_t *log);
@@ -494,7 +493,9 @@ ngx_init_cycle(ngx_cycle_t *old_cycle)
                     continue;
                 }
 
-                if (ngx_cmp_sockaddr(nls[n].sockaddr, ls[i].sockaddr) == NGX_OK)
+                if (ngx_cmp_sockaddr(nls[n].sockaddr, nls[n].socklen,
+                                     ls[i].sockaddr, ls[n].socklen, 1)
+                    == NGX_OK)
                 {
                     nls[n].fd = ls[i].fd;
                     nls[n].previous = &ls[i];
@@ -848,74 +849,6 @@ ngx_destroy_cycle_pools(ngx_conf_t *conf)
 }
 
 
-static ngx_int_t
-ngx_cmp_sockaddr(struct sockaddr *sa1, struct sockaddr *sa2)
-{
-    struct sockaddr_in   *sin1, *sin2;
-#if (NGX_HAVE_INET6)
-    struct sockaddr_in6  *sin61, *sin62;
-#endif
-#if (NGX_HAVE_UNIX_DOMAIN)
-    struct sockaddr_un   *saun1, *saun2;
-#endif
-
-    if (sa1->sa_family != sa2->sa_family) {
-        return NGX_DECLINED;
-    }
-
-    switch (sa1->sa_family) {
-
-#if (NGX_HAVE_INET6)
-    case AF_INET6:
-        sin61 = (struct sockaddr_in6 *) sa1;
-        sin62 = (struct sockaddr_in6 *) sa2;
-
-        if (sin61->sin6_port != sin62->sin6_port) {
-            return NGX_DECLINED;
-        }
-
-        if (ngx_memcmp(&sin61->sin6_addr, &sin62->sin6_addr, 16) != 0) {
-            return NGX_DECLINED;
-        }
-
-        break;
-#endif
-
-#if (NGX_HAVE_UNIX_DOMAIN)
-    case AF_UNIX:
-       saun1 = (struct sockaddr_un *) sa1;
-       saun2 = (struct sockaddr_un *) sa2;
-
-       if (ngx_memcmp(&saun1->sun_path, &saun2->sun_path,
-                      sizeof(saun1->sun_path))
-           != 0)
-       {
-           return NGX_DECLINED;
-       }
-
-       break;
-#endif
-
-    default: /* AF_INET */
-
-        sin1 = (struct sockaddr_in *) sa1;
-        sin2 = (struct sockaddr_in *) sa2;
-
-        if (sin1->sin_port != sin2->sin_port) {
-            return NGX_DECLINED;
-        }
-
-        if (sin1->sin_addr.s_addr != sin2->sin_addr.s_addr) {
-            return NGX_DECLINED;
-        }
-
-        break;
-    }
-
-    return NGX_OK;
-}
-
-
 static ngx_int_t
 ngx_init_zone_pool(ngx_cycle_t *cycle, ngx_shm_zone_t *zn)
 {
diff --git a/src/core/ngx_inet.c b/src/core/ngx_inet.c
index 0792d6e8c..26c5bc4b0 100644
--- a/src/core/ngx_inet.c
+++ b/src/core/ngx_inet.c
@@ -1196,3 +1196,76 @@ ngx_inet_resolve_host(ngx_pool_t *pool, ngx_url_t *u)
 }
 
 #endif /* NGX_HAVE_GETADDRINFO && NGX_HAVE_INET6 */
+
+
+ngx_int_t
+ngx_cmp_sockaddr(struct sockaddr *sa1, socklen_t slen1,
+    struct sockaddr *sa2, socklen_t slen2, ngx_uint_t cmp_port)
+{
+    struct sockaddr_in   *sin1, *sin2;
+#if (NGX_HAVE_INET6)
+    struct sockaddr_in6  *sin61, *sin62;
+#endif
+#if (NGX_HAVE_UNIX_DOMAIN)
+    struct sockaddr_un   *saun1, *saun2;
+#endif
+
+    if (sa1->sa_family != sa2->sa_family) {
+        return NGX_DECLINED;
+    }
+
+    switch (sa1->sa_family) {
+
+#if (NGX_HAVE_INET6)
+    case AF_INET6:
+
+        sin61 = (struct sockaddr_in6 *) sa1;
+        sin62 = (struct sockaddr_in6 *) sa2;
+
+        if (cmp_port && sin61->sin6_port != sin62->sin6_port) {
+            return NGX_DECLINED;
+        }
+
+        if (ngx_memcmp(&sin61->sin6_addr, &sin62->sin6_addr, 16) != 0) {
+            return NGX_DECLINED;
+        }
+
+        break;
+#endif
+
+#if (NGX_HAVE_UNIX_DOMAIN)
+    case AF_UNIX:
+
+       /* TODO length */
+
+       saun1 = (struct sockaddr_un *) sa1;
+       saun2 = (struct sockaddr_un *) sa2;
+
+       if (ngx_memcmp(&saun1->sun_path, &saun2->sun_path,
+                      sizeof(saun1->sun_path))
+           != 0)
+       {
+           return NGX_DECLINED;
+       }
+
+       break;
+#endif
+
+    default: /* AF_INET */
+
+        sin1 = (struct sockaddr_in *) sa1;
+        sin2 = (struct sockaddr_in *) sa2;
+
+        if (cmp_port && sin1->sin_port != sin2->sin_port) {
+            return NGX_DECLINED;
+        }
+
+        if (sin1->sin_addr.s_addr != sin2->sin_addr.s_addr) {
+            return NGX_DECLINED;
+        }
+
+        break;
+    }
+
+    return NGX_OK;
+}
diff --git a/src/core/ngx_inet.h b/src/core/ngx_inet.h
index d8f44c1e7..05557509d 100644
--- a/src/core/ngx_inet.h
+++ b/src/core/ngx_inet.h
@@ -115,6 +115,8 @@ ngx_int_t ngx_parse_addr(ngx_pool_t *pool, ngx_addr_t *addr, u_char *text,
     size_t len);
 ngx_int_t ngx_parse_url(ngx_pool_t *pool, ngx_url_t *u);
 ngx_int_t ngx_inet_resolve_host(ngx_pool_t *pool, ngx_url_t *u);
+ngx_int_t ngx_cmp_sockaddr(struct sockaddr *sa1, socklen_t slen1,
+    struct sockaddr *sa2, socklen_t slen2, ngx_uint_t cmp_port);
 
 
 #endif /* _NGX_INET_H_INCLUDED_ */