diff --git a/plugins/deny-protocol-version/mosquitto_deny_protocol_version.c b/plugins/deny-protocol-version/mosquitto_deny_protocol_version.c
index 191cf710..323a0d81 100644
--- a/plugins/deny-protocol-version/mosquitto_deny_protocol_version.c
+++ b/plugins/deny-protocol-version/mosquitto_deny_protocol_version.c
@@ -106,5 +106,5 @@ int mosquitto_plugin_cleanup(void *user_data, struct mosquitto_opt *opts, int op
 	UNUSED(opts);
 	UNUSED(opt_count);
 
-	return mosquitto_callback_unregister(mosq_pid, MOSQ_EVT_MESSAGE, basic_auth_callback, NULL);
+	return mosquitto_callback_unregister(mosq_pid, MOSQ_EVT_BASIC_AUTH, basic_auth_callback, NULL);
 }