diff --git a/lib/form/select.php b/lib/form/select.php
index e0f8cf931509f..9e052dacc40b4 100644
--- a/lib/form/select.php
+++ b/lib/form/select.php
@@ -224,10 +224,6 @@ public function export_for_template(renderer_base $output) {
         }
         $context['options'] = $options;
 
-        if ($this->getAttribute('multiple')) {
-            $context['name'] = $context['name'] . '[]';
-        }
-
         return $context;
     }
 }
diff --git a/lib/form/templatable_form_element.php b/lib/form/templatable_form_element.php
index ad1b5996d2f00..7d8c2abb80478 100644
--- a/lib/form/templatable_form_element.php
+++ b/lib/form/templatable_form_element.php
@@ -82,6 +82,11 @@ public function export_for_template(renderer_base $output) {
         $context['type'] = $this->getType();
         $context['attributes'] = implode(' ', $otherattributes);
 
+        // Elements with multiple values need array syntax.
+        if ($this->getAttribute('multiple')) {
+            $context['name'] = $context['name'] . '[]';
+        }
+
         return $context;
     }
 }