diff --git a/main/exercice/answer.class.php b/main/exercice/answer.class.php
index 76ff253fa9..4aa6d0a55d 100755
--- a/main/exercice/answer.class.php
+++ b/main/exercice/answer.class.php
@@ -73,7 +73,7 @@ class Answer
         $exerciseId = isset($_REQUEST['exerciseId']) ? $_REQUEST['exerciseId'] : null;
         $objExercise->read($exerciseId);
 
-        if ($objExercise->random_answers == '1') {
+        if ($objExercise->random_answers == '1' && $this->getQuestionType() != CALCULATED_ANSWER) {
             $this->readOrderedBy('rand()', '');// randomize answers
         } else {
             $this->read(); // natural order