diff --git a/Documentation/mm/hugetlbfs_reserv.rst b/Documentation/mm/hugetlbfs_reserv.rst
index 4914fbf07966..a49115db18c7 100644
--- a/Documentation/mm/hugetlbfs_reserv.rst
+++ b/Documentation/mm/hugetlbfs_reserv.rst
@@ -155,7 +155,7 @@ are enough free huge pages to accommodate the reservation.  If there are,
 the global reservation count resv_huge_pages is adjusted something like the
 following::
 
-	if (resv_needed <= (resv_huge_pages - free_huge_pages))
+	if (resv_needed <= (free_huge_pages - resv_huge_pages)
 		resv_huge_pages += resv_needed;
 
 Note that the global lock hugetlb_lock is held when checking and adjusting