diff --git a/sys/kern/kern_malloc.c b/sys/kern/kern_malloc.c
index e7c81d67e936..e6bc60c8a6bf 100644
--- a/sys/kern/kern_malloc.c
+++ b/sys/kern/kern_malloc.c
@@ -110,9 +110,6 @@ MALLOC_DEFINE(M_CACHE, "cache", "Various Dynamically allocated caches");
 MALLOC_DEFINE(M_DEVBUF, "devbuf", "device driver memory");
 MALLOC_DEFINE(M_TEMP, "temp", "misc temporary data buffers");
 
-MALLOC_DEFINE(M_IP6OPT, "ip6opt", "IPv6 options");
-MALLOC_DEFINE(M_IP6NDP, "ip6ndp", "IPv6 Neighbor Discovery");
-
 static struct malloc_type *kmemstatistics;
 static int kmemcount;
 
diff --git a/sys/netinet6/ip6_output.c b/sys/netinet6/ip6_output.c
index 1f780bd6a536..ad905b9972f7 100644
--- a/sys/netinet6/ip6_output.c
+++ b/sys/netinet6/ip6_output.c
@@ -135,6 +135,8 @@ struct ip6_exthdrs {
 	struct mbuf *ip6e_dest2;
 };
 
+static MALLOC_DEFINE(M_IP6OPT, "ip6opt", "IPv6 options");
+
 static int ip6_pcbopt(int, u_char *, int, struct ip6_pktopts **,
 			   struct ucred *, int);
 static int ip6_pcbopts(struct ip6_pktopts **, struct mbuf *,
diff --git a/sys/netinet6/nd6.c b/sys/netinet6/nd6.c
index d18ebd85f391..f71cd6a004df 100644
--- a/sys/netinet6/nd6.c
+++ b/sys/netinet6/nd6.c
@@ -85,6 +85,8 @@ __FBSDID("$FreeBSD$");
 
 #define SIN6(s) ((const struct sockaddr_in6 *)(s))
 
+MALLOC_DEFINE(M_IP6NDP, "ip6ndp", "IPv6 Neighbor Discovery");
+
 /* timer values */
 VNET_DEFINE(int, nd6_prune)	= 1;	/* walk list every 1 seconds */
 VNET_DEFINE(int, nd6_delay)	= 5;	/* delay first probe time 5 second */
diff --git a/sys/netinet6/nd6.h b/sys/netinet6/nd6.h
index 3b1aa96e70b1..0978f0d2e966 100644
--- a/sys/netinet6/nd6.h
+++ b/sys/netinet6/nd6.h
@@ -316,6 +316,10 @@ struct nd_pfxrouter {
 
 LIST_HEAD(nd_prhead, nd_prefix);
 
+#ifdef MALLOC_DECLARE
+MALLOC_DECLARE(M_IP6NDP);
+#endif
+
 /* nd6.c */
 VNET_DECLARE(int, nd6_prune);
 VNET_DECLARE(int, nd6_delay);
diff --git a/sys/sys/malloc.h b/sys/sys/malloc.h
index c09d74996bb4..b53066399d3b 100644
--- a/sys/sys/malloc.h
+++ b/sys/sys/malloc.h
@@ -146,9 +146,6 @@ MALLOC_DECLARE(M_CACHE);
 MALLOC_DECLARE(M_DEVBUF);
 MALLOC_DECLARE(M_TEMP);
 
-MALLOC_DECLARE(M_IP6OPT); /* for INET6 */
-MALLOC_DECLARE(M_IP6NDP); /* for INET6 */
-
 /*
  * Deprecated macro versions of not-quite-malloc() and free().
  */