diff --git a/protocol.h b/protocol.h
index f2b8e6f..44de89e 100644
--- a/protocol.h
+++ b/protocol.h
@@ -120,13 +120,8 @@
 
 int protocol_negotiate_version(struct mbox_context *context, uint8_t requested);
 
-#define EVENT_SUPPRESS		false
-#define EVENT_TRIGGER		true
-
-int protocol_events_set(struct mbox_context *context, uint8_t bmc_event,
-			bool write_back);
-int protocol_events_clear(struct mbox_context *context, uint8_t bmc_event,
-			  bool write_back);
+int protocol_events_set(struct mbox_context *context, uint8_t bmc_event);
+int protocol_events_clear(struct mbox_context *context, uint8_t bmc_event);
 
 /* Protocol v1 */
 int protocol_v1_reset(struct mbox_context *context);