diff --git a/fio.h b/fio.h
index 5928b45..82dc118 100644
--- a/fio.h
+++ b/fio.h
@@ -653,6 +653,7 @@
 extern int terse_version;
 extern int is_backend;
 extern int nr_clients;
+extern int log_syslog;
 
 extern struct thread_data *threads;