Posix requires to include , not . FreeBSD has no . From Nikola Lecic . diff -ur dvipng-1.14.orig/special.c dvipng-1.14/special.c --- dvipng-1.14.orig/special.c 2010-12-15 16:01:07.000000000 +0100 +++ dvipng-1.14/special.c 2011-02-07 11:47:08.000000000 +0100 @@ -26,7 +26,7 @@ #ifndef MIKTEX #ifndef WIN32 -#include +#include #else /* WIN32 */ #include #include