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--- src/dtmf.cpp.orig Fri Feb 20 17:23:13 2004 +++ src/dtmf.cpp Fri Feb 20 17:23:19 2004 @@ -30,6 +30,7 @@ #include <stdint.h> #include <string.h> #include <stdio.h> +#include <stdlib.h> #include <time.h> #include <fcntl.h> #include "audio.h"