diff --git a/question/type/ordering/db/upgrade.php b/question/type/ordering/db/upgrade.php
index 71f58d7e8cd..7bad633ddbd 100644
--- a/question/type/ordering/db/upgrade.php
+++ b/question/type/ordering/db/upgrade.php
@@ -257,10 +257,31 @@ function xmldb_qtype_ordering_upgrade($oldversion) {
         } else {
             $dbman->add_field($table, $field);
         }
-
-        // Ordering savepoint reached.
         upgrade_plugin_savepoint(true, $newversion, 'qtype', 'ordering');
     }
+
+    $newversion = '2019073193';
+    if ($oldversion < $newversion) {
+        $table = 'qtype_ordering_options';
+        $field = 'numberingstyle';
+        $select = "$field = ? OR $field = ?";
+        $params = array('III', 'ABC');
+        if ($options = $DB->get_records_select($table, $select, $params, $field, "id,$field")) {
+            foreach ($options as $option) {
+                switch ($option->numberingstyle) {
+                    case 'ABC':
+                        $DB->set_field($table, $field, 'ABCD', array('id' => $option->id));
+                        break;
+                    case 'III':
+                        $DB->set_field($table, $field, 'IIII', array('id' => $option->id));
+                        break;
+                    // Ignore "abc", "iii", and anything else.
+                }
+            }
+        }
+        upgrade_plugin_savepoint(true, $newversion, 'qtype', 'ordering');
+    }
+
     return true;
 }
 
diff --git a/question/type/ordering/lang/en/qtype_ordering.php b/question/type/ordering/lang/en/qtype_ordering.php
index 60d2bb0286e..53c7e2e2e34 100644
--- a/question/type/ordering/lang/en/qtype_ordering.php
+++ b/question/type/ordering/lang/en/qtype_ordering.php
@@ -83,9 +83,9 @@ $string['numberingstyle'] = 'Number the choices?';
 $string['numberingstylenone'] = 'No numbering';
 $string['numberingstyle123'] = '1., 2., 3., ...';
 $string['numberingstyleabc'] = 'a., b., c., ...';
-$string['numberingstyleABC'] = 'A., B., C., ...';
+$string['numberingstyleABCD'] = 'A., B., C., ...';
 $string['numberingstyleiii'] = 'i., ii., iii., ...';
-$string['numberingstyleIII'] = 'I., II., III., ...';
+$string['numberingstyleIIII'] = 'I., II., III., ...';
 $string['numberingstyle_desc'] = 'The default numbering style.';
 $string['numberingstyle_help'] = 'Choose the numbering style for draggable items in this question.';
 
diff --git a/question/type/ordering/question.php b/question/type/ordering/question.php
index 82be329a2a6..cc09774d590 100644
--- a/question/type/ordering/question.php
+++ b/question/type/ordering/question.php
@@ -839,10 +839,10 @@ class qtype_ordering_question extends question_graded_automatically {
         $plugin = 'qtype_ordering';
         $styles = array('none' => get_string('numberingstylenone', $plugin),
                         'abc'  => get_string('numberingstyleabc',  $plugin),
-                        'ABC'  => get_string('numberingstyleABC',  $plugin),
+                        'ABCD'  => get_string('numberingstyleABCD',  $plugin),
                         '123'  => get_string('numberingstyle123',  $plugin),
                         'iii'  => get_string('numberingstyleiii',  $plugin),
-                        'III'  => get_string('numberingstyleIII',  $plugin));
+                        'IIII'  => get_string('numberingstyleIIII',  $plugin));
         return self::get_types($styles, $style);
     }
 }
diff --git a/question/type/ordering/questiontype.php b/question/type/ordering/questiontype.php
index 4f2b118bbed..25fcfa27518 100644
--- a/question/type/ordering/questiontype.php
+++ b/question/type/ordering/questiontype.php
@@ -357,7 +357,7 @@ class qtype_ordering extends question_type {
                           'LONGEST_ORDERED_SUBSET|'.
                           'LONGEST_CONTIGUOUS_SUBSET)?';
         $showgrading = '(?:SHOW|TRUE|YES|1|HIDE|FALSE|NO|0)?';
-        $numberingstyle = '(?:none|123|abc|ABC|iii|III)?';
+        $numberingstyle = '(?:none|123|abc|ABCD|iii|IIII)?';
         $search = '/^\s*>\s*('.$selectcount.')\s*'.
                            '('.$selecttype.')\s*'.
                            '('.$layouttype.')\s*'.
@@ -884,9 +884,9 @@ class qtype_ordering extends question_type {
             case 'none':
             case '123':
             case 'abc':
-            case 'ABC':
+            case 'ABCD':
             case 'iii':
-            case 'III':
+            case 'IIII':
                 $question->numberingstyle = $numberingstyle;
                 break;
 
diff --git a/question/type/ordering/version.php b/question/type/ordering/version.php
index 72849f15f10..cee11ff4e15 100644
--- a/question/type/ordering/version.php
+++ b/question/type/ordering/version.php
@@ -29,5 +29,5 @@ $plugin->cron      = 0;
 $plugin->component = 'qtype_ordering';
 $plugin->maturity  = MATURITY_STABLE;
 $plugin->requires  = 2015051100; // Moodle 2.9.
-$plugin->version   = 2019071292;
-$plugin->release   = '2019-07-12 (92)';
+$plugin->version   = 2019073193;
+$plugin->release   = '2019-07-31 (93)';