--- a/source/scriptinterface/tests/test_ScriptConversions.h	2022-01-09 14:43:35.662140959 +0530
+++ b/source/scriptinterface/tests/test_ScriptConversions.h	2022-01-09 14:45:06.284713166 +0530
@@ -208,7 +208,7 @@
 		JS::RootedValue testNANVal(rq.cx);
 		Script::ToJSVal(rq, &testNANVal, NAN);
 		TS_ASSERT(Script::FromJSVal(rq, testNANVal, f));
-		TS_ASSERT(isnan(f));
+		TS_ASSERT(std::isnan(f));
 	}
 
 	// NOTE: fixed and vector conversions are defined in simulation2/scripting/EngineScriptConversions.cpp