diff --git a/plugins/tty.c b/plugins/tty.c
index a00b8282..d0c9bfaa 100644
--- a/plugins/tty.c
+++ b/plugins/tty.c
@@ -45,7 +45,7 @@ static plugin_t plugin = {
 
 static void setup(void)
 {
-	if (plugin.io.fd)
+	if (plugin.io.fd > 0)
 		close(plugin.io.fd);
 
 	plugin.io.fd = inotify_init1(IN_NONBLOCK | IN_CLOEXEC);