diff --git a/biscuit/apps/untis/parse.py b/biscuit/apps/untis/parse.py
index be987c621cd6c07265f6fa1e7e45b2ba6d3a7529..1e288895e52ef2c366fb33cdb19006929ddc64bc 100755
--- a/biscuit/apps/untis/parse.py
+++ b/biscuit/apps/untis/parse.py
@@ -240,7 +240,9 @@ def get_lesson_element_by_id_and_teacher(lesson_id, teacher, hour=None, weekday=
             t = time
     print(t)
     room = None
-    if t is not None:
+    if t is not None and len(t.rooms) > i:
+        print(t.rooms)
+        print(len(t.rooms))
         room = t.rooms[i]
 
     if el is not None: