1 files changed, 1 insertions, 0 deletions

diff --git a/thread.c b/thread.c
index 803ed66494..736946bf68 100644
--- a/thread.c
+++ b/thread.c
@@ -2197,6 +2197,7 @@ rb_notify_fd_close(int fd)
     return busy;
 }
 
+NORETURN(void rb_thread_fd_close(int fd));
 void
 rb_thread_fd_close(int fd)
 {