diff --git a/include/linux/nfs_page.h b/include/linux/nfs_page.h
index d111be6..2e555d4 100644
--- a/include/linux/nfs_page.h
+++ b/include/linux/nfs_page.h
@@ -31,6 +31,7 @@
 #define PG_NEED_COMMIT		1
 #define PG_NEED_RESCHED		2
 #define PG_NEED_FLUSH		3
+#define PG_FLUSHING		4
 
 struct nfs_inode;
 struct nfs_page {