diff -Naur torcs-1.3.7/src/drivers/olethros/geometry.cpp torcs-1.3.7.patched/src/drivers/olethros/geometry.cpp --- torcs-1.3.7/src/drivers/olethros/geometry.cpp 2006-01-06 10:22:29.000000000 -0500 +++ torcs-1.3.7.patched/src/drivers/olethros/geometry.cpp 2017-07-04 17:00:06.727000000 -0400 @@ -27,6 +27,8 @@ #ifdef WIN32 #include <float.h> #define isnan _isnan +#else +#define isnan std::isnan #endif