diff --git a/system/helpers/string_helper.php b/system/helpers/string_helper.php
index 2f928a7..9fa69f4 100644
--- a/system/helpers/string_helper.php
+++ b/system/helpers/string_helper.php
@@ -246,9 +246,11 @@
  * Add's _1 to a string or increment the ending number to allow _2, _3, etc
  *
  * @param   string  $str  required
+ * @param   string  $separator  What should the duplicate number be appended with
+ * @param   string  $first  Which number should be used for the first dupe increment
  * @return  string
  */
-function increment_string($str, $first = 1, $separator = '_')
+function increment_string($str, $separator = '_', $first = 1)
 {
 	preg_match('/(.+)'.$separator.'([0-9]+)$/', $str, $match);