diff --git a/selfdrive/ui/ui.h b/selfdrive/ui/ui.h
index 3b3d11b67a..fe9e96462f 100644
--- a/selfdrive/ui/ui.h
+++ b/selfdrive/ui/ui.h
@@ -2,6 +2,7 @@
 
 #include <memory>
 #include <string>
+#include <optional>
 
 #include <QObject>
 #include <QTimer>