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--- ginac-1.5.1.org/ginac/parser/lexer.cpp 2009-03-16 22:04:09.000000000 +0530 +++ ginac-1.5.1/ginac/parser/lexer.cpp 2009-03-16 22:04:30.000000000 +0530 @@ -23,6 +23,7 @@ #include "lexer.h" #include "compiler.h" +#include <cstdio> #include <iostream> #include <sstream> #include <string>