diff --git a/mm/vmscan.c b/mm/vmscan.c
index 062767d159da..1ef5a2eeb298 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -2464,7 +2464,7 @@ void scan_mapping_unevictable_pages(struct address_space *mapping)
  * back onto @zone's unevictable list.
  */
 #define SCAN_UNEVICTABLE_BATCH_SIZE 16UL /* arbitrary lock hold batch size */
-void scan_zone_unevictable_pages(struct zone *zone)
+static void scan_zone_unevictable_pages(struct zone *zone)
 {
 	struct list_head *l_unevictable = &zone->lru[LRU_UNEVICTABLE].list;
 	unsigned long scan;