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);
 
diff --git a/user_guide/changelog.html b/user_guide/changelog.html
index 8f0fad7..20b1c4e 100644
--- a/user_guide/changelog.html
+++ b/user_guide/changelog.html
@@ -70,6 +70,7 @@
 	</li>
 	<li>Helpers
 		<ul>
+			<li class="reactor">Added <samp>increment_string()</samp> to <a href="helpers/string_helper.html">String Helper</a> to turn "foo" into "foo-1" or "foo-1" into "foo-2".</li>
 		</ul>
 	</li>
 	<li>Database
diff --git a/user_guide/helpers/string_helper.html b/user_guide/helpers/string_helper.html
index 169ee4e..7c1d30c 100644
--- a/user_guide/helpers/string_helper.html
+++ b/user_guide/helpers/string_helper.html
@@ -90,6 +90,17 @@
 <code>echo random_string('alnum', 16);</code>
 
 
+<h2>increment_string()</h2>
+
+<p>Increments a string by appending a number to it or increasing the number. Useful for creating "copies" or a file or duplicating database content which has unique titles or slugs.</p>
+
+<p>Usage example:</p>
+
+<code>echo increment_string('file', '_'); // "file_1"<br/>
+echo increment_string('file', '-', 2); // "file-2"<br/>
+echo increment_string('file-4'); // "file-5"<br/></code>
+
+
 <h2>alternator()</h2>
 
 <p>Allows two or more items to be alternated between, when cycling through a loop.  Example:</p>