--- scripts/kconfig/conf.c

+++ scripts/kconfig/conf.c

@@ -332,7 +332,7 @@ static int conf_choice(struct menu *menu

}

if (!child)

continue;

- if (line[strlen(line) - 1] == '?') {

+ if (line[0] && line[strlen(line) - 1] == '?') {

print_help(child);

continue;

}