diff --git a/src/tl/unit_tests/tlVariantTests.cc b/src/tl/unit_tests/tlVariantTests.cc
index 84ca9755b..d03a56d1c 100644
--- a/src/tl/unit_tests/tlVariantTests.cc
+++ b/src/tl/unit_tests/tlVariantTests.cc
@@ -28,11 +28,12 @@
 #include "tlTypeTraits.h"
 #include "tlUnitTest.h"
 
-#define _USE_MATH_DEFINES // for MSVC
-#include <cmath>
 #include <cstdio>
 #include <memory>
 
+#define _USE_MATH_DEFINES // for MSVC
+#include <math.h>
+
 struct A 
 {
   std::string a;