diff --git a/thread_options.h b/thread_options.h
index 9975af1..5354473 100644
--- a/thread_options.h
+++ b/thread_options.h
@@ -123,6 +123,8 @@
 	fio_fp64_t zipf_theta;
 	fio_fp64_t pareto_h;
 
+	unsigned int random_generator;
+
 	unsigned int hugepage_size;
 	unsigned int rw_min_bs;
 	unsigned int thinktime;
@@ -326,6 +328,8 @@
 	fio_fp64_t zipf_theta;
 	fio_fp64_t pareto_h;
 
+	uint32_t random_generator;
+
 	uint32_t hugepage_size;
 	uint32_t rw_min_bs;
 	uint32_t thinktime;