diff --git a/sys/vm/vm_domainset.c b/sys/vm/vm_domainset.c
index 2aa516e62ee0..b26e9697dc6a 100644
--- a/sys/vm/vm_domainset.c
+++ b/sys/vm/vm_domainset.c
@@ -351,4 +351,12 @@ vm_domainset_iter_policy_init(struct vm_domainset_iter *di,
 	*domain = 0;
 }
 
+void
+vm_domainset_iter_policy_ref_init(struct vm_domainset_iter *di,
+    struct domainset_ref *dr, int *domain, int *flags)
+{
+
+	*domain = 0;
+}
+
 #endif /* NUMA */