diff --git a/mkdocs/utils/filters.py b/mkdocs/utils/filters.py
index abf715f9ac..95d181f883 100644
--- a/mkdocs/utils/filters.py
+++ b/mkdocs/utils/filters.py
@@ -1,9 +1,14 @@
-import jinja2
+try:
+    from jinja2 import pass_context as contextfilter
+    print('a')
+except ImportError:
+    from jinja2 import contextfilter
+    print('b')
 
 from mkdocs.utils import normalize_url
 
 
-@jinja2.contextfilter
+@contextfilter
 def url_filter(context, value):
     """ A Template filter to normalize URLs. """
     return normalize_url(value, page=context['page'], base=context['base_url'])