diff --git a/src/xrt/drivers/north_star/distortion_3d/utility_northstar.h b/src/xrt/drivers/north_star/distortion_3d/utility_northstar.h
index 6fdcaf2b3..9efecfee5 100644
--- a/src/xrt/drivers/north_star/distortion_3d/utility_northstar.h
+++ b/src/xrt/drivers/north_star/distortion_3d/utility_northstar.h
@@ -4,7 +4,7 @@
 
 #pragma once
 
-#include <math.h>
+#include "math/m_mathinclude.h"
 using namespace std;
 
 // min set of functions needed