diff --git a/drivers/staging/lustre/lustre/ptlrpc/sec_plain.c b/drivers/staging/lustre/lustre/ptlrpc/sec_plain.c
index a243db60f697..d905b77b758b 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/sec_plain.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/sec_plain.c
@@ -46,6 +46,7 @@
 #include "../include/obd_class.h"
 #include "../include/lustre_net.h"
 #include "../include/lustre_sec.h"
+#include "ptlrpc_internal.h"
 
 struct plain_sec {
 	struct ptlrpc_sec       pls_base;