diff -up torcs-1.3.7/src/drivers/olethros/geometry.cpp.orig torcs-1.3.7/src/drivers/olethros/geometry.cpp

--- torcs-1.3.7/src/drivers/olethros/geometry.cpp.orig	2016-06-07 19:49:11.347896827 +0100

+++ torcs-1.3.7/src/drivers/olethros/geometry.cpp	2016-06-07 19:49:46.532894257 +0100

@@ -27,6 +27,8 @@

 #ifdef WIN32

 #include <float.h>

 #define isnan _isnan

+#else

+#define isnan std::isnan

 #endif