diff --git a/src/vr_app.hpp b/src/vr_app.hpp
index 0b1716841067d62e2adb0fd417b54434cc9cf02a..7ea36aed5d36be745cda6164d29d06cb2a3e131d 100644
--- a/src/vr_app.hpp
+++ b/src/vr_app.hpp
@@ -1,3 +1,5 @@
+#pragma once
+
 #include <liblava/lava.hpp>
 #include <openvr.h>
 #include <optional>