1 files changed, 5 insertions, 5 deletions
diff --git a/regex.c b/regex.c
index 7632faee..0c7e27b9 100644
--- a/regex.c
+++ b/regex.c
@@ -1770,8 +1770,8 @@ static regm_result_t regex_machine_feed(regex_machine_t *regm, wchar_t ch)
 val search_regex(val haystack, val needle_regex, val start,
                  val from_end)
 {
-  if (!start)
-    start = zero;
+  start = default_arg(start, zero);
+  from_end = default_bool_arg(from_end);
 
   if (length_str_lt(haystack, start)) {
     return nil;
@@ -1827,8 +1827,8 @@ val match_regex(val str, val reg, val pos)
   regex_machine_t regm;
   val i, retval;
   regm_result_t last_res = REGM_INCOMPLETE;
-  if (!pos)
-    pos = zero;
+
+  pos = default_arg(pos, zero);
 
   regex_machine_init(&regm, reg);
 
@@ -1859,7 +1859,7 @@ val match_regex_right(val str, val regex, val end)
   val pos = zero;
   val slen = length(str);
 
-  if (!end || gt(end, slen))
+  if (null_or_missing_p(end) || gt(end, slen))
     end = slen;
 
   while (lt(pos, end)) {