diff --git a/sys/include/net/gnrc/ipv6/hdr.h b/sys/include/net/gnrc/ipv6/hdr.h
index 638c1fc5bf..6828e2f416 100644
--- a/sys/include/net/gnrc/ipv6/hdr.h
+++ b/sys/include/net/gnrc/ipv6/hdr.h
@@ -43,8 +43,8 @@ extern "C" {
  * @return  The an IPv6 header in packet buffer on success.
  * @return  NULL on error.
  */
-gnrc_pktsnip_t *gnrc_ipv6_hdr_build(gnrc_pktsnip_t *payload, ipv6_addr_t *src,
-                                    ipv6_addr_t *dst);
+gnrc_pktsnip_t *gnrc_ipv6_hdr_build(gnrc_pktsnip_t *payload, const ipv6_addr_t *src,
+                                    const ipv6_addr_t *dst);
 
 #ifdef __cplusplus
 }
diff --git a/sys/net/gnrc/network_layer/ipv6/hdr/gnrc_ipv6_hdr.c b/sys/net/gnrc/network_layer/ipv6/hdr/gnrc_ipv6_hdr.c
index d467937c38..4d3295294d 100644
--- a/sys/net/gnrc/network_layer/ipv6/hdr/gnrc_ipv6_hdr.c
+++ b/sys/net/gnrc/network_layer/ipv6/hdr/gnrc_ipv6_hdr.c
@@ -32,8 +32,8 @@ static char addr_str[IPV6_ADDR_MAX_STR_LEN];
 #define HDR_NETTYPE (GNRC_NETTYPE_UNDEF)
 #endif
 
-gnrc_pktsnip_t *gnrc_ipv6_hdr_build(gnrc_pktsnip_t *payload, ipv6_addr_t *src,
-                                    ipv6_addr_t *dst)
+gnrc_pktsnip_t *gnrc_ipv6_hdr_build(gnrc_pktsnip_t *payload, const ipv6_addr_t *src,
+                                    const ipv6_addr_t *dst)
 {
     gnrc_pktsnip_t *ipv6;
     ipv6_hdr_t *hdr;