diff --git a/selfdrive/ui/soundd/sound.h b/selfdrive/ui/soundd/sound.h
index f7084fff97..81a5f1a86b 100644
--- a/selfdrive/ui/soundd/sound.h
+++ b/selfdrive/ui/soundd/sound.h
@@ -1,3 +1,5 @@
+#pragma once
+
 #include <tuple>
 
 #include <QMap>