diff --git a/iscsi-scst/kernel/isert-scst/iser.h b/iscsi-scst/kernel/isert-scst/iser.h
index 9dbadf816..c543c8b38 100644
--- a/iscsi-scst/kernel/isert-scst/iser.h
+++ b/iscsi-scst/kernel/isert-scst/iser.h
@@ -269,8 +269,8 @@ struct isert_global {
 	struct workqueue_struct	*conn_wq;
 };
 
-#define _ptr_to_u64(p)		(u64)(unsigned long)(p)
-#define _u64_to_ptr(v)		(void *)(unsigned long)(v)
+#define _ptr_to_u64(p)		((u64)(unsigned long)(p))
+#define _u64_to_ptr(v)		((void *)(unsigned long)(v))
 
 /* global iser scope */
 int isert_global_init(void);