diff --git a/drivers/staging/lustre/lnet/klnds/o2iblnd/o2iblnd_cb.c b/drivers/staging/lustre/lnet/klnds/o2iblnd/o2iblnd_cb.c
index 47eb8b4c28db..65b7a62943ad 100644
--- a/drivers/staging/lustre/lnet/klnds/o2iblnd/o2iblnd_cb.c
+++ b/drivers/staging/lustre/lnet/klnds/o2iblnd/o2iblnd_cb.c
@@ -35,6 +35,7 @@
  * Author: Eric Barton <eric@bartonsoftware.com>
  */
 
+#include <linux/highmem.h>
 #include "o2iblnd.h"
 
 #define MAX_CONN_RACES_BEFORE_ABORT 20