diff --git a/sys/vm/phys_pager.c b/sys/vm/phys_pager.c
index a93dda1c0fd8..98c505c1cb09 100644
--- a/sys/vm/phys_pager.c
+++ b/sys/vm/phys_pager.c
@@ -147,7 +147,9 @@ phys_pager_getpages(vm_object_t object, vm_page_t *m, int count, int reqpage)
 			vm_page_zero_fill(m[i]);
 		vm_page_flag_set(m[i], PG_ZERO);
 		/* Switch off pv_entries */
+		vm_page_lock_queues();
 		vm_page_unmanage(m[i]);
+		vm_page_unlock_queues();
 		m[i]->valid = VM_PAGE_BITS_ALL;
 		m[i]->dirty = 0;
 		/* The requested page must remain busy, the others not. */
diff --git a/sys/vm/vm_page.c b/sys/vm/vm_page.c
index 74eb575cfdd5..6e08ec11c7b1 100644
--- a/sys/vm/vm_page.c
+++ b/sys/vm/vm_page.c
@@ -1211,6 +1211,7 @@ vm_page_unmanage(vm_page_t m)
 	int s;
 
 	s = splvm();
+	mtx_assert(&vm_page_queue_mtx, MA_OWNED);
 	if ((m->flags & PG_UNMANAGED) == 0) {
 		if (m->wire_count == 0)
 			vm_pageq_remove(m);