diff --git a/system/Helpers/form_helper.php b/system/Helpers/form_helper.php
index 54a86f9c2c00..c073f0eebe60 100644
--- a/system/Helpers/form_helper.php
+++ b/system/Helpers/form_helper.php
@@ -28,7 +28,7 @@ function form_open(string $action = '', array $attributes = [], array $hidden =
             $action = site_url($action);
         }
 
-        $attributes = stringify_attributes($attributes);
+        $attributes = str_replace('/', '/', stringify_attributes($attributes));
 
         if (stripos($attributes, 'method=') === false)
         {
diff --git a/tests/system/Helpers/FormHelperTest.php b/tests/system/Helpers/FormHelperTest.php
index e73e48d488b5..d9e371127ce0 100644
--- a/tests/system/Helpers/FormHelperTest.php
+++ b/tests/system/Helpers/FormHelperTest.php
@@ -7,6 +7,15 @@ public function setUp()
         helper('form');
     }
     // ------------------------------------------------------------------------
+    public function testFormMultiPart()
+    {
+        helper('url');
+        $expected = <<<EOH
+<form action="http:///index.php/user/login" class="form" enctype="multipart/form-data" method="post" accept-charset="utf-8">\n
+EOH;
+        $this->assertEquals($expected, form_open_multipart('user/login', ['class'=>'form']));
+    }
+    // ------------------------------------------------------------------------
     public function textFormHidden()
     {
         $expected = <<<EOH