ih = skb_header_pointer(skb, offset, sizeof(_iph), &_iph);
        if (ih == NULL)
                sprintf(buf, "%s TRUNCATED", pp->name);
-       else if (ih->frag_off & __constant_htons(IP_OFFSET))
+       else if (ih->frag_off & htons(IP_OFFSET))
                sprintf(buf, "%s %u.%u.%u.%u->%u.%u.%u.%u frag",
                        pp->name, NIPQUAD(ih->saddr),
                        NIPQUAD(ih->daddr));
 
        if (likely(!inverse)) {
                cp = ip_vs_conn_in_get(IPPROTO_UDP,
                                       iph->saddr,
-                                      __constant_htons(PORT_ISAKMP),
+                                      htons(PORT_ISAKMP),
                                       iph->daddr,
-                                      __constant_htons(PORT_ISAKMP));
+                                      htons(PORT_ISAKMP));
        } else {
                cp = ip_vs_conn_in_get(IPPROTO_UDP,
                                       iph->daddr,
-                                      __constant_htons(PORT_ISAKMP),
+                                      htons(PORT_ISAKMP),
                                       iph->saddr,
-                                      __constant_htons(PORT_ISAKMP));
+                                      htons(PORT_ISAKMP));
        }
 
        if (!cp) {
        if (likely(!inverse)) {
                cp = ip_vs_conn_out_get(IPPROTO_UDP,
                                        iph->saddr,
-                                       __constant_htons(PORT_ISAKMP),
+                                       htons(PORT_ISAKMP),
                                        iph->daddr,
-                                       __constant_htons(PORT_ISAKMP));
+                                       htons(PORT_ISAKMP));
        } else {
                cp = ip_vs_conn_out_get(IPPROTO_UDP,
                                        iph->daddr,
-                                       __constant_htons(PORT_ISAKMP),
+                                       htons(PORT_ISAKMP),
                                        iph->saddr,
-                                       __constant_htons(PORT_ISAKMP));
+                                       htons(PORT_ISAKMP));
        }
 
        if (!cp) {