diff --git a/cornice/service.py b/cornice/service.py
index 3e14681..ade2551 100644
--- a/cornice/service.py
+++ b/cornice/service.py
@@ -216,7 +216,6 @@ class Service(object):
             def callback(context, name, ob):
                 config = context.config.with_package(info.module)
                 config.add_cornice_service(self)
-
             info = venusian.attach(self, callback, category='pyramid',
                                    depth=depth)

@@ -530,15 +529,16 @@ def decorate_view(view, args, method):
         # location (if the view argument isn't a callable)
         ob = None
         view_ = view
-        if 'klass' in args and not callable(view):
+        if 'klass' in args:
             params = dict(request=request)
             if 'factory' in args and 'acl' not in args:
                 params['context'] = request.context
             ob = args['klass'](**params)
-            if is_string(view):
-                view_ = getattr(ob, view.lower())
-            elif isinstance(view, _UnboundView):
-                view_ = view.make_bound_view(ob)
+            if not callable(view):
+                if is_string(view):
+                    view_ = getattr(ob, view.lower())
+                elif isinstance(view, _UnboundView):
+                    view_ = view.make_bound_view(ob)

         # set data deserializer
         if 'deserializer' in args: