diff --git a/sys/net/destiny/socket.c b/sys/net/destiny/socket.c
index b22d88102e..f2ecfa000a 100644
--- a/sys/net/destiny/socket.c
+++ b/sys/net/destiny/socket.c
@@ -1013,8 +1013,10 @@ int32_t destiny_socket_sendto(int s, const void *buf, uint32_t len, int flags,
         current_udp_packet->length = HTONS(UDP_HDR_LEN + len);
         temp_ipv6_header->length = UDP_HDR_LEN + len;
 
-        current_udp_packet->checksum = ~udp_csum(temp_ipv6_header,
-                                       current_udp_packet);
+        current_udp_packet->checksum = ~ipv6_csum(temp_ipv6_header,
+                                                   (uint8_t*) current_udp_packet,
+                                                   UDP_HDR_LEN + len,
+                                                   IPPROTO_UDP);
 
         ipv6_sendto(&to->sin6_addr, IPPROTO_UDP,
                     (uint8_t *)(current_udp_packet),
diff --git a/sys/net/destiny/udp.c b/sys/net/destiny/udp.c
index 4cf6c31a61..b82043da0b 100644
--- a/sys/net/destiny/udp.c
+++ b/sys/net/destiny/udp.c
@@ -58,7 +58,7 @@ void udp_packet_handler(void)
         udp_header = ((udp_hdr_t *)(m_recv_ip.content.ptr + IPV6_HDR_LEN));
         payload = (uint8_t *)(m_recv_ip.content.ptr + IPV6_HDR_LEN + UDP_HDR_LEN);
 
-        chksum = udp_csum(ipv6_header, udp_header);
+        chksum = ipv6_csum(ipv6_header, (uint8_t*) udp_header, NTOHS(udp_header->length), IPPROTO_UDP);
 
         if (chksum == 0xffff) {
             udp_socket = get_udp_socket(ipv6_header, udp_header);