diff --git a/system/helpers/form_helper.php b/system/helpers/form_helper.php
index c78b805..60d2631 100644
--- a/system/helpers/form_helper.php
+++ b/system/helpers/form_helper.php
@@ -84,7 +84,15 @@
 {
 	function form_open_multipart($action, $attributes = array(), $hidden = array())
 	{
-		$attributes['enctype'] = 'multipart/form-data';
+		if (is_string($attributes))
+		{
+			$attributes .= ' enctype="multipart/form-data"';
+		}
+		else
+		{
+			$attributes['enctype'] = 'multipart/form-data';
+		}
+
 		return form_open($action, $attributes, $hidden);
 	}
 }
diff --git a/user_guide/changelog.html b/user_guide/changelog.html
index ba7ab2b..92765c4 100644
--- a/user_guide/changelog.html
+++ b/user_guide/changelog.html
@@ -106,6 +106,7 @@
 	<li>Fixed a bug where Active Record override parameter would not let you disable Active Record if it was enabled in your database config file.</li>
 	<li>Fixed a bug in reduce_double_slashes() in the String Helper to properly remove duplicate leading slashes (#7585)</li>
 	<li>Fixed a bug in values_parsing() of the XML-RPC library which prevented NULL variables typed as 'string' from being handled properly.</li>
+	<li>Fixed a bug were form_open_multipart() didn't accept string attribute arguments (#10930).</li>
 </ul>
 
 <h2>Version 1.7.2</h2>