diff --git a/sys/net/pfvar.h b/sys/net/pfvar.h
--- a/sys/net/pfvar.h
+++ b/sys/net/pfvar.h
@@ -598,6 +598,25 @@
 #endif /* PF_INET6_ONLY */
 #endif /* PF_INET_INET6 */
 
+#ifdef _KERNEL
+#ifdef INET6
+static void inline
+pf_addrcpy(struct pf_addr *dst, const struct pf_addr *src, sa_family_t af)
+{
+	switch (af) {
+#ifdef INET
+	case AF_INET:
+		memcpy(&dst->v4, &src->v4, sizeof(dst->v4));
+		break;
+#endif /* INET */
+	case AF_INET6:
+		memcpy(&dst->v6, &src->v6, sizeof(dst->v6));
+		break;
+	}
+}
+#endif /* INET6 */
+#endif
+
 /*
  * XXX callers not FIB-aware in our version of pf yet.
  * OpenBSD fixed it later it seems, 2010/05/07 13:33:16 claudio.
diff --git a/sys/netpfil/pf/pf.c b/sys/netpfil/pf/pf.c
--- a/sys/netpfil/pf/pf.c
+++ b/sys/netpfil/pf/pf.c
@@ -798,23 +798,6 @@
 	s->src.state = newstate;
 }
 
-#ifdef INET6
-void
-pf_addrcpy(struct pf_addr *dst, const struct pf_addr *src, sa_family_t af)
-{
-	switch (af) {
-#ifdef INET
-	case AF_INET:
-		memcpy(&dst->v4, &src->v4, sizeof(dst->v4));
-		break;
-#endif /* INET */
-	case AF_INET6:
-		memcpy(&dst->v6, &src->v6, sizeof(dst->v6));
-		break;
-	}
-}
-#endif /* INET6 */
-
 static void
 pf_init_threshold(struct pf_threshold *threshold,
     u_int32_t limit, u_int32_t seconds)