diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 88ba277bc3a7..2d6ccc21a822 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -985,7 +985,7 @@ static void btrfs_readahead_expand(struct readahead_control *ractl,
 {
 	const u64 ra_pos = readahead_pos(ractl);
 	const u64 ra_end = ra_pos + readahead_length(ractl);
-	const u64 em_end = em->start + em->ram_bytes;
+	const u64 em_end = em->start + em->len;
 
 	/* No expansion for holes and inline extents. */
 	if (em->block_start > EXTENT_MAP_LAST_BYTE)