diff --git a/stat.c b/stat.c
index 84d9eef..1bfbbeb 100644
--- a/stat.c
+++ b/stat.c
@@ -14,7 +14,7 @@
 #include "lib/getrusage.h"
 #include "idletime.h"
 
-static struct fio_mutex *stat_mutex;
+struct fio_mutex *stat_mutex;
 
 void update_rusage_stat(struct thread_data *td)
 {