diff --git a/fs/nfs/callback.c b/fs/nfs/callback.c
index 560d617..f2ca782 100644
--- a/fs/nfs/callback.c
+++ b/fs/nfs/callback.c
@@ -14,6 +14,7 @@
 #include <linux/sunrpc/svc.h>
 #include <linux/sunrpc/svcsock.h>
 #include <linux/nfs_fs.h>
+#include "nfs4_fs.h"
 #include "callback.h"
 
 #define NFSDBG_FACILITY NFSDBG_CALLBACK