1 files changed, 1 insertions, 0 deletions
diff --git a/io.c b/io.c
index ac5230910b..951505c6a4 100644
--- a/io.c
+++ b/io.c
@@ -1023,6 +1023,7 @@ rb_io_wait_writable(int f)
 #if defined(ERESTART)
       case ERESTART:
 #endif
+	rb_thread_wait_fd(f);
 	return TRUE;
 
       case EAGAIN: