diff --git a/include/linux/backing-dev.h b/include/linux/backing-dev.h
index f1b402a..4ce34fa 100644
--- a/include/linux/backing-dev.h
+++ b/include/linux/backing-dev.h
@@ -111,6 +111,7 @@
 
 extern spinlock_t bdi_lock;
 extern struct list_head bdi_list;
+extern struct list_head bdi_pending_list;
 
 static inline int wb_has_dirty_io(struct bdi_writeback *wb)
 {