diff --git a/fs/9p/vfs_dir.c b/fs/9p/vfs_dir.c
index 899f168..170f5bb 100644
--- a/fs/9p/vfs_dir.c
+++ b/fs/9p/vfs_dir.c
@@ -242,7 +242,8 @@
 		while (rdir->head < rdir->tail) {
 
 			err = p9dirent_read(rdir->buf + rdir->head,
-						buflen - rdir->head, &curdirent,
+						rdir->tail - rdir->head,
+						&curdirent,
 						fid->clnt->proto_version);
 			if (err < 0) {
 				P9_DPRINTK(P9_DEBUG_VFS, "returned %d\n", err);