diff --git a/fs/internal.h b/fs/internal.h
index f6dce46..4cc67eb 100644
--- a/fs/internal.h
+++ b/fs/internal.h
@@ -105,4 +105,5 @@
 /*
  * inode.c
  */
+extern int get_nr_dirty_inodes(void);
 extern int invalidate_inodes(struct super_block *);