diff --git a/fs/xfs/xfs_reflink.c b/fs/xfs/xfs_reflink.c
index 42ea7bab9144cc026f50d802acc31c42ab7f0858..7088f44c0c5947d4fccf5df4315d56158e8da5c3 100644
--- a/fs/xfs/xfs_reflink.c
+++ b/fs/xfs/xfs_reflink.c
@@ -302,6 +302,7 @@ xfs_reflink_reserve_cow(
 	if (error)
 		return error;
 
+	xfs_trim_extent(imap, got.br_startoff, got.br_blockcount);
 	trace_xfs_reflink_cow_alloc(ip, &got);
 	return 0;
 }