diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index c8e4501..5bba3b3 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -1864,8 +1864,10 @@
 		 * wait_table may be allocated from boot memory,
 		 * here only free if it's allocated by vmalloc.
 		 */
-		if (is_vmalloc_addr(zone->wait_table))
+		if (is_vmalloc_addr(zone->wait_table)) {
 			vfree(zone->wait_table);
+			zone->wait_table = NULL;
+		}
 	}
 }
 EXPORT_SYMBOL(try_offline_node);