diff --git a/src/allmydata/test/test_storage.py b/src/allmydata/test/test_storage.py
index 56dba406e..b7d1b6e9f 100644
--- a/src/allmydata/test/test_storage.py
+++ b/src/allmydata/test/test_storage.py
@@ -4223,9 +4223,9 @@ class WebStatus(unittest.TestCase, pollmixin.PollMixin, WebRenderingMixin):
 
     def test_util(self):
         w = StorageStatusElement(None, None)
-        self.failUnlessEqual(w.render_space(None, None), "?")
-        self.failUnlessEqual(w.render_space(None, 10e6), "10000000")
-        self.failUnlessEqual(w.render_abbrev_space(None, None), "?")
-        self.failUnlessEqual(w.render_abbrev_space(None, 10e6), "10.00 MB")
+        self.failUnlessEqual(w.render_space(None), "?")
+        self.failUnlessEqual(w.render_space(10e6), "10000000")
+        self.failUnlessEqual(w.render_abbrev_space(None), "?")
+        self.failUnlessEqual(w.render_abbrev_space(10e6), "10.00 MB")
         self.failUnlessEqual(remove_prefix("foo.bar", "foo."), "bar")
         self.failUnlessEqual(remove_prefix("foo.bar", "baz."), None)
diff --git a/src/allmydata/web/storage.py b/src/allmydata/web/storage.py
index 6b033bc5a..88f099b24 100644
--- a/src/allmydata/web/storage.py
+++ b/src/allmydata/web/storage.py
@@ -50,12 +50,12 @@ class StorageStatusElement(Element):
             return tag("?")
         return tag(abbreviate_space(val))
 
-    def render_abbrev_space(self, ctx, size):
+    def render_abbrev_space(self, size):
         if size is None:
             return "?"
         return abbreviate_space(size)
 
-    def render_space(self, ctx, size):
+    def render_space(self, size):
         if size is None:
             return "?"
         return "%d" % size