extern int stdin_ferror(void);
extern int stdin_ungetc(int);
extern uschar *string_append(uschar *, int *, int *, int, ...) WARN_UNUSED_RESULT;
-extern uschar *string_append_listele(uschar *, uschar, const uschar *);
-extern uschar *string_append_listele_n(uschar *, uschar, const uschar *, unsigned);
+extern uschar *string_append_listele(uschar *, int *, int *, uschar, const uschar *) WARN_UNUSED_RESULT;
+extern uschar *string_append_listele_n(uschar *, int *, int *, uschar, const uschar *, unsigned) WARN_UNUSED_RESULT;
extern uschar *string_base62(unsigned long int);
extern uschar *string_cat(uschar *, int *, int *, const uschar *) WARN_UNUSED_RESULT;
extern uschar *string_catn(uschar *, int *, int *, const uschar *, int) WARN_UNUSED_RESULT;