uschar errbuf[128];
pcre2_get_error_message(err, errbuf, sizeof(errbuf));
*error_pointer = string_sprintf("error while compiling "
- "regular expression \"%s\": %s at offset %l",
+ "regular expression \"%s\": %s at offset %ld",
exp[1], errbuf, (long)offset);
return FALSE;
}