1 files changed, 3 insertions, 0 deletions
diff --git a/intern.h b/intern.h
index 65c916328c..d063d53495 100644
--- a/intern.h
+++ b/intern.h
@@ -204,10 +204,13 @@ int rb_thread_alone _((void));
 void rb_thread_polling _((void));
 void rb_thread_sleep _((int));
 void rb_thread_sleep_forever _((void));
+enum rb_thread_status rb_thread_status _((VALUE));
 VALUE rb_thread_stop _((void));
 VALUE rb_thread_wakeup _((VALUE));
+VALUE rb_thread_wakeup_alive _((VALUE));
 VALUE rb_thread_run _((VALUE));
 VALUE rb_thread_kill _((VALUE));
+VALUE rb_thread_alive_p _((VALUE));
 VALUE rb_thread_create _((VALUE (*)(ANYARGS), void*));
 void rb_thread_interrupt _((void));
 void rb_thread_trap_eval _((VALUE, int, int));