--- a/src/ftmenu.c 2018-04-26 23:37:11.004875301 -0700 +++ b/src/ftmenu.c 2018-04-26 23:36:48.794546383 -0700 @@ -4,6 +4,7 @@ #include <string.h> #include <stdio.h> #include <unistd.h> +#include <stdlib.h> #include "ftmenu.h" GtkWidget *menu[MAX_MENU_DEPTH];