diff --git a/mm/hwpoison-inject.c b/mm/hwpoison-inject.c
index bb0cea5468cb..5c0cddd81505 100644
--- a/mm/hwpoison-inject.c
+++ b/mm/hwpoison-inject.c
@@ -65,6 +65,7 @@ DEFINE_DEBUGFS_ATTRIBUTE(unpoison_fops, NULL, hwpoison_unpoison, "%lli\n");
 
 static void pfn_inject_exit(void)
 {
+	hwpoison_filter_enable = 0;
 	debugfs_remove_recursive(hwpoison_dir);
 }