diff --git a/code/MultiForm.php b/code/MultiForm.php
index 2a3c4b9..2ba1e0a 100644
--- a/code/MultiForm.php
+++ b/code/MultiForm.php
@@ -257,8 +257,9 @@ abstract class MultiForm extends Form {
 	 * @param int|string $id The ID of the record to retrieve
 	 * @return MultiFormSession
 	 */
-	function getSessionRecordByID($id) {
-		return DataObject::get_one('MultiFormSession', "MultiFormSession.ID = $id AND IsComplete = 0");
+	function getSessionRecordByID($id) {
+		$SQL_id = (int)$id;
+		return DataObject::get_one('MultiFormSession', "MultiFormSession.ID = {$SQL_id} AND IsComplete = 0");
 	}
 
 	/**