diff --git a/code/MultiForm.php b/code/MultiForm.php
index 03ea739..bcdf2d1 100644
--- a/code/MultiForm.php
+++ b/code/MultiForm.php
@@ -100,7 +100,9 @@ abstract class MultiForm extends Form {
 		// Set up the actions from the current step
 		$this->setActions();
 		
-		// Set a hidden field in the form to define what this form session ID is
+		// Set a hidden field in the form to identify this session.
+		// Depending on what has been configured for $url_type, we
+		// find an encrypted hash to identify the session.
 		$urlMethod = $this->stat('url_type');
 		$this->fields->push(new HiddenField('MultiFormSessionID', false, $this->session->$urlMethod));