--- ./src/subsim.cpp.orig 2007-06-11 11:16:23.000000000 -0400 +++ ./src/subsim.cpp 2014-08-11 09:56:15.000000000 -0400 @@ -31,6 +31,7 @@ #else #include "oglext/OglExt.h" #endif +#include #include #include #include