diff --git a/mod/assign/db/services.php b/mod/assign/db/services.php
index 068e80d1dd9..1333210207f 100644
--- a/mod/assign/db/services.php
+++ b/mod/assign/db/services.php
@@ -25,6 +25,15 @@
 
 $functions = array(
 
+        'mod_assign_copy_previous_attempt' => array(
+            'classname'     => 'mod_assign_external',
+            'methodname'    => 'copy_previous_attempt',
+            'classpath'     => 'mod/assign/externallib.php',
+            'description'   => 'Copy a students previous attempt to a new attempt.',
+            'type'          => 'write',
+            'capabilities'  => 'mod/assign:view, mod/assign:submit'
+        ),
+
         'mod_assign_get_grades' => array(
                 'classname'   => 'mod_assign_external',
                 'methodname'  => 'get_grades',
diff --git a/mod/assign/externallib.php b/mod/assign/externallib.php
index 9bdc7cc63d9..d3107244cab 100644
--- a/mod/assign/externallib.php
+++ b/mod/assign/externallib.php
@@ -2160,7 +2160,7 @@ class mod_assign_external extends external_api {
 
     /**
      * Describes the parameters for copy_previous_attempt
-     * @return external_external_function_parameters
+     * @return external_function_parameters
      * @since  Moodle 2.6
      */
     public static function copy_previous_attempt_parameters() {
@@ -2179,12 +2179,11 @@ class mod_assign_external extends external_api {
      * @since Moodle 2.6
      */
     public static function copy_previous_attempt($assignmentid) {
-        global $CFG, $USER;
 
         $params = self::validate_parameters(self::copy_previous_attempt_parameters(),
                                             array('assignmentid' => $assignmentid));
 
-        $cm = get_coursemodule_from_instance('assign', $assignmentid, 0, false, MUST_EXIST);
+        $cm = get_coursemodule_from_instance('assign', $params['assignmentid'], 0, false, MUST_EXIST);
         $context = context_module::instance($cm->id);
         self::validate_context($context);
 
@@ -2192,7 +2191,7 @@ class mod_assign_external extends external_api {
 
         $notices = array();
 
-        $assignment->copy_previous_attempt($submissiondata, $notices);
+        $assignment->copy_previous_attempt($notices);
 
         $warnings = array();
         foreach ($notices as $notice) {
diff --git a/mod/assign/version.php b/mod/assign/version.php
index 23e28b25f71..c43996a1c0b 100644
--- a/mod/assign/version.php
+++ b/mod/assign/version.php
@@ -25,6 +25,6 @@
 defined('MOODLE_INTERNAL') || die();
 
 $plugin->component = 'mod_assign'; // Full name of the plugin (used for diagnostics).
-$plugin->version  = 2016070400;    // The current module version (Date: YYYYMMDDXX).
+$plugin->version  = 2016070401;    // The current module version (Date: YYYYMMDDXX).
 $plugin->requires = 2016051900;    // Requires this Moodle version.
 $plugin->cron     = 60;