diff --git a/include/linux/mm.h b/include/linux/mm.h
index 7dc04ff..1007421 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1159,6 +1159,7 @@
 
 /* mm/page-writeback.c */
 int write_one_page(struct page *page, int wait);
+void task_dirty_inc(struct task_struct *tsk);
 
 /* readahead.c */
 #define VM_MAX_READAHEAD	128	/* kbytes */