diff --git a/jsonschema/compat.py b/jsonschema/compat.py
index 0afd9ea..b3156f9 100644
--- a/jsonschema/compat.py
+++ b/jsonschema/compat.py
@@ -1,6 +1,5 @@
 from __future__ import unicode_literals
 
-from collections import namedtuple
 import operator
 import sys
 
@@ -43,9 +42,6 @@ def urlsplit(url):
     return SplitResult(scheme, netloc, path, query, fragment)
 
 
-DefragResult = namedtuple('DefragResult', 'url fragment')
-
-
 def urldefrag(url):
     if "#" in url:
         s, n, p, q, frag = urlsplit(url)
@@ -53,7 +49,7 @@ def urldefrag(url):
     else:
         defrag = url
         frag = ''
-    return DefragResult(defrag, frag)
+    return defrag, frag
 
 
 # flake8: noqa
diff --git a/jsonschema/validators.py b/jsonschema/validators.py
index 435b8db..2343908 100644
--- a/jsonschema/validators.py
+++ b/jsonschema/validators.py
@@ -312,16 +312,16 @@ class RefResolver(object):
         return url, self.resolve_cache(url)
 
     def resolve_from_url(self, url):
-        ref = urldefrag(url)
+        url, fragment = urldefrag(url)
         try:
-            document = self.store[ref.url]
+            document = self.store[url]
         except KeyError:
             try:
-                document = self.resolve_remote(ref.url)
+                document = self.resolve_remote(url)
             except Exception as exc:
                 raise RefResolutionError(exc)
 
-        return self.resolve_fragment(document, ref.fragment)
+        return self.resolve_fragment(document, fragment)
 
     def resolve_fragment(self, document, fragment):
         """