diff --git a/sc2/src/regex/regcomp.ci b/sc2/src/regex/regcomp.ci
index 0710f0941..6803d73e8 100644
--- a/sc2/src/regex/regcomp.ci
+++ b/sc2/src/regex/regcomp.ci
@@ -530,8 +530,8 @@ weak_alias (__regcomp, regcomp)
    from either regcomp or regexec.   We don't use PREG here.  */
 
 size_t
-regerror (errcode, preg, errbuf, errbuf_size)
-    int errcode;
+regerror (err_code, preg, errbuf, errbuf_size)
+    int err_code;
     const regex_t *preg;
     char *errbuf;
     size_t errbuf_size;
@@ -539,8 +539,8 @@ regerror (errcode, preg, errbuf, errbuf_size)
   const char *msg;
   size_t msg_size;
 
-  if (BE (errcode < 0
-	  || errcode >= (int) (sizeof (__re_error_msgid_idx)
+  if (BE (err_code < 0
+	  || err_code >= (int) (sizeof (__re_error_msgid_idx)
 			       / sizeof (__re_error_msgid_idx[0])), 0))
     /* Only error codes returned by the rest of the code should be passed
        to this routine.  If we are given anything else, or if other regex
@@ -548,7 +548,7 @@ regerror (errcode, preg, errbuf, errbuf_size)
        Dump core so we can fix it.  */
     abort ();
 
-  msg = gettext (__re_error_msgid + __re_error_msgid_idx[errcode]);
+  msg = gettext (__re_error_msgid + __re_error_msgid_idx[err_code]);
 
   msg_size = strlen (msg) + 1; /* Includes the null.  */