diff --git a/quiz.module b/quiz.module
index aa61a7e..0cc45b1 100644
--- a/quiz.module
+++ b/quiz.module
@@ -3667,7 +3667,8 @@ function quiz_get_questions($quiz_nid = NULL, $quiz_vid = NULL, $include_all_typ
   $query->join('node_revision', 'nr', 'n.nid = nr.nid');
   $query->leftJoin('quiz_node_relationship', 'qnr', 'nr.vid = qnr.child_vid');
 
-  if ($include_all_types === TRUE) {
+  $question_types = _quiz_get_question_types();
+  if ($include_all_types === TRUE && count($question_types) > 0) {
     $query->condition('n.type', array_keys(_quiz_get_question_types()), 'IN');
   }