diff --git a/fs/nfs/callback.h b/fs/nfs/callback.h
index c07a8d460d36..4251c2ae06ad 100644
--- a/fs/nfs/callback.h
+++ b/fs/nfs/callback.h
@@ -208,5 +208,6 @@ extern int nfs4_set_callback_sessionid(struct nfs_client *clp);
 #define NFS41_BC_MAX_CALLBACKS 1
 
 extern unsigned int nfs_callback_set_tcpport;
+extern unsigned short nfs_callback_tcpport;
 
 #endif /* __LINUX_FS_NFS_CALLBACK_H */