diff --git a/fs/internal.h b/fs/internal.h
index dbec3cc..d55ef56 100644
--- a/fs/internal.h
+++ b/fs/internal.h
@@ -78,3 +78,8 @@
  * file_table.c
  */
 extern void mark_files_ro(struct super_block *);
+
+/*
+ * super.c
+ */
+extern int do_remount_sb(struct super_block *, int, void *, int);