diff --git a/mm/util.c b/mm/util.c
index 36b78dac0706..98771d2bdc67 100644
--- a/mm/util.c
+++ b/mm/util.c
@@ -847,6 +847,7 @@ int folio_mapcount(struct folio *folio)
 		ret -= nr;
 	return ret;
 }
+EXPORT_SYMBOL_GPL(folio_mapcount);
 
 /**
  * folio_copy - Copy the contents of one folio to another.