diff --git a/app/scodoc/sco_groups_view.py b/app/scodoc/sco_groups_view.py
index f14bc558..2477bb5d 100644
--- a/app/scodoc/sco_groups_view.py
+++ b/app/scodoc/sco_groups_view.py
@@ -305,8 +305,8 @@ class DisplayedGroupsInfos(object):
         if isinstance(group_ids, int):
             if group_ids:
                 group_ids = [group_ids]  # cas ou un seul parametre, pas de liste
-            else:
-                group_ids = []
+        else:
+            group_ids = [int(g) for g in group_ids]
         if not formsemestre_id and moduleimpl_id:
             mods = sco_moduleimpl.do_moduleimpl_list(moduleimpl_id=moduleimpl_id)
             if len(mods) != 1: