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-rw-r--r--include/ruby/intern.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/ruby/intern.h b/include/ruby/intern.h
index 1b7cabcd14..9e77533517 100644
--- a/include/ruby/intern.h
+++ b/include/ruby/intern.h
@@ -394,7 +394,7 @@ void rb_thread_wait_fd(int);
int rb_thread_fd_writable(int);
void rb_thread_fd_close(int);
int rb_thread_alone(void);
-void rb_thread_polling(void);
+DEPRECATED(void rb_thread_polling(void));
void rb_thread_sleep(int);
void rb_thread_sleep_forever(void);
VALUE rb_thread_stop(void);