diff --git a/profile.h b/profile.h
index de35e9b..8d1f757 100644
--- a/profile.h
+++ b/profile.h
@@ -27,6 +27,7 @@
 	 * Profile specific options
 	 */
 	struct fio_option *options;
+	void *opt_data;
 
 	/*
 	 * Called after parsing options, to prepare 'cmdline'