diff --git a/src/core/ipv6/ip6.c b/src/core/ipv6/ip6.c
index 90bf5b0f..b682eba4 100644
--- a/src/core/ipv6/ip6.c
+++ b/src/core/ipv6/ip6.c
@@ -976,7 +976,7 @@ netif_found:
       /* check payload length is multiple of 8 octets when mbit is set */
       if (IP6_FRAG_MBIT(frag_hdr) && (IP6H_PLEN(ip6hdr) & 0x7)) {
         /* ipv6 payload length is not multiple of 8 octets */
-        icmp6_param_problem(p, ICMP6_PP_FIELD, &ip6hdr->_plen);
+        icmp6_param_problem(p, ICMP6_PP_FIELD, LWIP_PACKED_CAST(const void *, &ip6hdr->_plen));
         LWIP_DEBUGF(IP6_DEBUG, ("ip6_input: packet with invalid payload length dropped\n"));
         pbuf_free(p);
         IP6_STATS_INC(ip6.drop);
diff --git a/src/include/lwip/arch.h b/src/include/lwip/arch.h
index 488f9972..dafd500c 100644
--- a/src/include/lwip/arch.h
+++ b/src/include/lwip/arch.h
@@ -220,6 +220,11 @@ typedef int ssize_t;
 #define LWIP_PTR_NUMERIC_CAST(target_type, val) LWIP_CONST_CAST(target_type, val)
 #endif
 
+/** Avoid warnings/errors related to implicitly casting away packed attributes by doing a explicit cast */
+#ifndef LWIP_PACKED_CAST
+#define LWIP_PACKED_CAST(target_type, val) LWIP_CONST_CAST(target_type, val)
+#endif
+
 /** Allocates a memory buffer of specified size that is of sufficient size to align
  * its start address using LWIP_MEM_ALIGN.
  * You can declare your own version here e.g. to enforce alignment without adding