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-rw-r--r--include/ruby/intern.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/ruby/intern.h b/include/ruby/intern.h
index 5581c05925..0ba0e6e6b2 100644
--- a/include/ruby/intern.h
+++ b/include/ruby/intern.h
@@ -428,6 +428,7 @@ int rb_thread_alone(void);
DEPRECATED(void rb_thread_polling(void));
void rb_thread_sleep(int);
void rb_thread_sleep_forever(void);
+void rb_thread_sleep_deadly(void);
VALUE rb_thread_stop(void);
VALUE rb_thread_wakeup(VALUE);
VALUE rb_thread_wakeup_alive(VALUE);