diff --git tty-term.c tty-term.c
index fdf0c4fa..873e1ce2 100644
--- tty-term.c
+++ tty-term.c
@@ -762,33 +762,53 @@ tty_term_string(struct tty_term *term, enum tty_code_code code)
 const char *
 tty_term_string1(struct tty_term *term, enum tty_code_code code, int a)
 {
-	return (tparm((char *) tty_term_string(term, code), a, 0, 0, 0, 0, 0, 0, 0, 0));
+	const char	*x = tty_term_string(term, code), *s;
+	s = tiparm_s(1, 0, x, a);
+	if (s == NULL)
+		fatalx("could not expand %s", tty_term_codes[code].name);
+	return (s);
 }
 
 const char *
 tty_term_string2(struct tty_term *term, enum tty_code_code code, int a, int b)
 {
-	return (tparm((char *) tty_term_string(term, code), a, b, 0, 0, 0, 0, 0, 0, 0));
+	const char	*x = tty_term_string(term, code), *s;
+	s = tiparm_s(2, 0, x, a, b);
+	if (s == NULL)
+		fatalx("could not expand %s", tty_term_codes[code].name);
+	return (s);
 }
 
 const char *
 tty_term_string3(struct tty_term *term, enum tty_code_code code, int a, int b,
     int c)
 {
-	return (tparm((char *) tty_term_string(term, code), a, b, c, 0, 0, 0, 0, 0, 0));
+	const char	*x = tty_term_string(term, code), *s;
+	s = tiparm_s(3, 0, x, a, b, c);
+	if (s == NULL)
+		fatalx("could not expand %s", tty_term_codes[code].name);
+	return (s);
 }
 
 const char *
 tty_term_ptr1(struct tty_term *term, enum tty_code_code code, const void *a)
 {
-	return (tparm((char *) tty_term_string(term, code), (long)a, 0, 0, 0, 0, 0, 0, 0, 0));
+	const char	*x = tty_term_string(term, code), *s;
+	s = tiparm_s(1, 1, x, a);
+	if (s == NULL)
+		fatalx("could not expand %s", tty_term_codes[code].name);
+	return (s);
 }
 
 const char *
 tty_term_ptr2(struct tty_term *term, enum tty_code_code code, const void *a,
     const void *b)
 {
-	return (tparm((char *) tty_term_string(term, code), (long)a, (long)b, 0, 0, 0, 0, 0, 0, 0));
+	const char	*x = tty_term_string(term, code), *s;
+	s = tiparm_s(2, 3, x, a, b);
+	if (s == NULL)
+		fatalx("could not expand %s", tty_term_codes[code].name);
+	return (s);
 }
 
 int