diff --git a/app/scodoc/sco_groups_view.py b/app/scodoc/sco_groups_view.py
index f14bc5586..3d6c494fb 100644
--- a/app/scodoc/sco_groups_view.py
+++ b/app/scodoc/sco_groups_view.py
@@ -165,7 +165,6 @@ def form_groups_choice(groups_infos, with_selectall_butt=False, submit_on_change
     Si submit_on_change, ajoute une classe "submit_on_change" qui est utilisee en JS
     """
     default_group_id = sco_groups.get_default_group(groups_infos.formsemestre_id)
-
     H = [
         """<form id="group_selector" method="get">
     <input type="hidden" name="formsemestre_id" id="formsemestre_id" value="%s"/>
@@ -305,8 +304,8 @@ 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:
diff --git a/app/scodoc/sco_page_etud.py b/app/scodoc/sco_page_etud.py
index bf9481234..6a59538cc 100644
--- a/app/scodoc/sco_page_etud.py
+++ b/app/scodoc/sco_page_etud.py
@@ -537,7 +537,7 @@ def etud_info_html(etudid, with_photo="1", REQUEST=None, debug=False):
     """An HTML div with basic information and links about this etud.
     Used for popups information windows.
     """
-    formsemestre_id = sco_formsemestre_status.retreive_formsemestre_from_request()
+    formsemestre_id = int(sco_formsemestre_status.retreive_formsemestre_from_request())
     with_photo = int(with_photo)
     etud = sco_etud.get_etud_info(filled=True)[0]
     photo_html = sco_photos.etud_photo_html(