diff --git a/stat.h b/stat.h
index a35f9b1..3115539 100644
--- a/stat.h
+++ b/stat.h
@@ -194,5 +194,8 @@
 extern void display_thread_status(struct jobs_eta *je);
 extern void show_run_stats(void);
 extern void sum_thread_stats(struct thread_stat *dst, struct thread_stat *src, int nr);
+extern void sum_group_stats(struct group_run_stats *dst, struct group_run_stats *src);
+extern void init_thread_stat(struct thread_stat *ts);
+extern void init_group_run_stat(struct group_run_stats *gs);
 
 #endif