--- a/source/maths/tests/test_Bound.h	2022-01-09 14:34:34.186686031 +0530
+++ b/source/maths/tests/test_Bound.h	2022-01-09 14:35:02.890232429 +0530
@@ -203,9 +203,9 @@
 		CBoundingBoxOriented result;
 		flatAabb.Transform(transform, result);
 
-		TS_ASSERT(!isnan(result.m_Basis[0].X) && !isnan(result.m_Basis[0].Y) && !isnan(result.m_Basis[0].Z));
-		TS_ASSERT(!isnan(result.m_Basis[1].X) && !isnan(result.m_Basis[1].Y) && !isnan(result.m_Basis[1].Z));
-		TS_ASSERT(!isnan(result.m_Basis[2].X) && !isnan(result.m_Basis[2].Y) && !isnan(result.m_Basis[2].Z));
+		TS_ASSERT(!std::isnan(result.m_Basis[0].X) && !std::isnan(result.m_Basis[0].Y) && !std::isnan(result.m_Basis[0].Z));
+		TS_ASSERT(!std::isnan(result.m_Basis[1].X) && !std::isnan(result.m_Basis[1].Y) && !std::isnan(result.m_Basis[1].Z));
+		TS_ASSERT(!std::isnan(result.m_Basis[2].X) && !std::isnan(result.m_Basis[2].Y) && !std::isnan(result.m_Basis[2].Z));
 	}
 
 	void test_point_visibility()