diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index a2d70163c1a0..cf7a34fcb1a7 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -1570,7 +1570,7 @@ out_unlock:
 		clear_bits |= EXTENT_CLEAR_DATA_RESV;
 		extent_clear_unlock_delalloc(inode, start, end, locked_page,
 					     clear_bits, page_ops);
-		btrfs_qgroup_free_data(inode, NULL, start, cur_alloc_size, NULL);
+		btrfs_qgroup_free_data(inode, NULL, start, end - start + 1, NULL);
 	}
 	return ret;
 }