1 files changed, 5 insertions, 0 deletions
diff --git a/ext/pty/pty.c b/ext/pty/pty.c
index f54bbb52e5..ec255cf202 100644
--- a/ext/pty/pty.c
+++ b/ext/pty/pty.c
@@ -538,6 +538,11 @@ pty_open(VALUE klass)
 static VALUE
 pty_detach_process(struct pty_info *info)
 {
+#ifdef WNOHANG
+    int st;
+    if (rb_waitpid(info->child_pid, &st, WNOHANG) <= 0)
+	return Qnil;
+#endif
     rb_detach_process(info->child_pid);
     return Qnil;
 }