diff --git a/src/xrt/drivers/wmr/wmr_bt_controller.h b/src/xrt/drivers/wmr/wmr_bt_controller.h
index c0b941fc1..556028453 100644
--- a/src/xrt/drivers/wmr/wmr_bt_controller.h
+++ b/src/xrt/drivers/wmr/wmr_bt_controller.h
@@ -9,7 +9,7 @@
  * @author Nis Madsen <nima_zero_one@protonmail.com>
  * @ingroup drv_wmr
  */
-
+#pragma once
 
 #include "os/os_threading.h"
 #include "math/m_imu_3dof.h"