diff --git a/sys/vm/vm.h b/sys/vm/vm.h
index fbb04cfc827..e1d3335183d 100644
--- a/sys/vm/vm.h
+++ b/sys/vm/vm.h
@@ -148,6 +148,8 @@ extern void vm_ksubmap_init(struct kva_md_info *);
 
 extern int old_mlock;
 
+extern int vm_ndomains;
+
 struct ucred;
 int swap_reserve(vm_ooffset_t incr);
 int swap_reserve_by_cred(vm_ooffset_t incr, struct ucred *cred);
diff --git a/sys/vm/vm_phys.h b/sys/vm/vm_phys.h
index f94b0393853..ac8e33d97c6 100644
--- a/sys/vm/vm_phys.h
+++ b/sys/vm/vm_phys.h
@@ -52,7 +52,6 @@ struct mem_affinity {
 extern struct mem_affinity *mem_affinity;
 extern int *mem_locality;
 #endif
-extern int vm_ndomains;
 
 struct vm_freelist {
 	struct pglist pl;