diff --git a/include/BNM/UnityStructures/Matrix4x4.hpp b/include/BNM/UnityStructures/Matrix4x4.hpp
index 3582db9..6755e05 100644
--- a/include/BNM/UnityStructures/Matrix4x4.hpp
+++ b/include/BNM/UnityStructures/Matrix4x4.hpp
@@ -5,6 +5,8 @@
 #include "Vector4.hpp"
 #include "Matrix3x3.hpp"
 
+#include <cmath>
+
 #define MAT(m, r, c) (m)[(c)*4+(r)]
 #define RETURN_ZERO do { for (int i=0;i<16;i++) out[i] = 0.0F; return false; } while(0)
 
@@ -839,4 +841,4 @@ namespace BNM::Structures::Unity {
     inline void TransformPoints3x4(const Matrix4x4& matrix, const Vector3* in, size_t inStride, Vector3* out, size_t outStride, int count) {
         for (int i = 0; i < count; ++i, in = Stride(in, inStride), out = Stride(out, outStride)) *out = matrix.MultiplyPoint3x4(*in);
     }
-}
\ No newline at end of file
+}