diff -up src/parsegen.cpp~ src/parsegen.cpp
--- src/parsegen.cpp~	2011-09-04 19:24:34.000000000 +0200
+++ src/parsegen.cpp	2011-09-04 19:34:58.509204919 +0200
@@ -662,6 +662,7 @@ void output_parser_start(ostream& c_stre
            << "Config file handler generated by Nach's Config file handler creator.\n"
            << "*/\n"
            << "\n"
+           << "#undef _FORTIFY_SOURCE\n"
            << "#include <stdio.h>\n"
            << "#include <stdlib.h>\n"
            << "#include <ctype.h>\n"