diff --git a/src/models/errors.tsp b/src/models/errors.tsp
index f34443c..ce46954 100644
--- a/src/models/errors.tsp
+++ b/src/models/errors.tsp
@@ -3,6 +3,7 @@ enum ErrorCode {
   ANSWER_NOT_FOUND,
   OUT_OF_PERIOD,
   DO_NOT_HAVE_PERMISSION_TO_POST_FORM_COMMENT,
+  DO_NOT_HAVE_PERMISSION_TO_GET_ANSWERS,
   INTERNAL_SERVER_ERROR,
 }