diff --git a/sys/vm/vm_pageout.c b/sys/vm/vm_pageout.c
index c50e9368748e..558d2b6cf3b5 100644
--- a/sys/vm/vm_pageout.c
+++ b/sys/vm/vm_pageout.c
@@ -65,7 +65,7 @@
  * any improvements or extensions that they make and grant Carnegie the
  * rights to redistribute these changes.
  *
- * $Id: vm_pageout.c,v 1.78 1996/06/24 04:30:24 dyson Exp $
+ * $Id: vm_pageout.c,v 1.79 1996/06/26 05:39:26 dyson Exp $
  */
 
 /*
@@ -539,7 +539,8 @@ vm_pageout_map_deactivate_pages(map, desired)
 			break;
 		if ((tmpe->is_sub_map == 0) && (tmpe->is_a_map == 0)) {
 			obj = tmpe->object.vm_object;
-			vm_pageout_object_deactivate_pages(map, obj, desired, 0);
+			if (obj)
+				vm_pageout_object_deactivate_pages(map, obj, desired, 0);
 		}
 		tmpe = tmpe->next;
 	};