diff --git a/SimoxUtility/math/normal/orthogonal_vector.h b/SimoxUtility/math/normal/orthogonal_vector.h
index 40a4f327d965b0d03c9ba7642c5dd576851a7eb9..62288d14ee278a8e20b76583d88dc1efab9a6d68 100644
--- a/SimoxUtility/math/normal/orthogonal_vector.h
+++ b/SimoxUtility/math/normal/orthogonal_vector.h
@@ -1,6 +1,7 @@
 #pragma once
 
 #include <Eigen/Geometry>
+#include <cmath>
 
 namespace simox::math
 {