diff -rupr a/libfcgi/fcgio.cpp b/libfcgi/fcgio.cpp --- a/libfcgi/fcgio.cpp 2002-02-24 20:12:22.000000000 +0000 +++ b/libfcgi/fcgio.cpp 2016-12-19 07:52:08.208120000 +0000 @@ -23,6 +23,7 @@ #endif #include <limits.h> +#include <cstdio> #include "fcgio.h" using std::streambuf;