diff --git a/imagekit/templatetags/imagekit_tags.py b/imagekit/templatetags/imagekit_tags.py
index b092ca4..959d479 100644
--- a/imagekit/templatetags/imagekit_tags.py
+++ b/imagekit/templatetags/imagekit_tags.py
@@ -34,7 +34,7 @@ class SpecResultNodeMixin(object):
         from ..utils import autodiscover
         autodiscover()
         spec_id = self._spec_id.resolve(context)
-        spec = specs.registry.get_spec(spec_id)
+        spec = specs.registry.get_spec(spec_id)  # TODO: What "hints" here?
         if callable(spec):
             spec = spec()
         return spec