diff --git a/include/linux/elevator.h b/include/linux/elevator.h
index 9c5a04f..b3370ef 100644
--- a/include/linux/elevator.h
+++ b/include/linux/elevator.h
@@ -3,6 +3,8 @@
 
 #include <linux/percpu.h>
 
+#ifdef CONFIG_BLOCK
+
 typedef int (elevator_merge_fn) (request_queue_t *, struct request **,
 				 struct bio *);
 
@@ -203,4 +205,5 @@
 	__val;							\
 })
 
+#endif /* CONFIG_BLOCK */
 #endif