diff --git a/c2cgeoportal/pyramid_.py b/c2cgeoportal/pyramid_.py
index 426277a87c..d526da73a2 100644
--- a/c2cgeoportal/pyramid_.py
+++ b/c2cgeoportal/pyramid_.py
@@ -187,15 +187,15 @@ def new_f(root, request):
     )
     # permalink theme: recover the theme for generating custom viewer.js url
     config.add_route(
-        "{0!s}theme".format(route_name),
-        "{0!s}{1!s}theme/{{themes}}".format(route, "" if route[-1] == "/" else "/"),
+        "{}theme".format(route_name),
+        "{}{}theme/{{themes}}".format(route, "" if route[-1] == "/" else "/"),
         request_method="GET",
     )
     config.add_view(
         Entry,
         decorator=add_interface,
         attr="get_ngeo_permalinktheme_vars",
-        route_name="{0!s}theme".format(route_name),
+        route_name="{}theme".format(route_name),
         renderer=renderer,
         permission=permission
     )
diff --git a/c2cgeoportal/scripts/import_ngeo_apps.py b/c2cgeoportal/scripts/import_ngeo_apps.py
index e0376efee1..630186a2a3 100644
--- a/c2cgeoportal/scripts/import_ngeo_apps.py
+++ b/c2cgeoportal/scripts/import_ngeo_apps.py
@@ -201,7 +201,11 @@ def main():
             <script>
                 var small_screen = window.matchMedia ? window.matchMedia('(max-width: 1024px)') : false;
                 if (small_screen && (('ontouchstart' in window) || window.DocumentTouch && document instanceof DocumentTouch)) {
+    % if "themes" in request.matchdict:
+                    window.location = "${request.route_url('mobiletheme', themes=request.matchdict['themes'], _query=dict(request.GET)) | n}";
+    % else:
                     window.location = "${request.route_url('mobile', _query=dict(request.GET)) | n}";
+    % endif
                 }
             </script>
     % endif