@@ -41,15 +41,14 @@
 
 
 def _sanitize(value):
+    if isinstance(value, dict):
+        return dict((k, _sanitize(v))
+                    for k, v in six.iteritems(value))
     if isinstance(value, six.string_types):
         return value.replace('/', '%2F')
     return value
 
 
-def _sanitize_dict(src):
-    return dict((k, _sanitize(v)) for k, v in src.items())
-
-
 class Gitlab(object):
     """Represents a GitLab server connection.
 
@@ -213,7 +212,7 @@ def set_url(self, url):
     def _construct_url(self, id_, obj, parameters):
         if 'next_url' in parameters:
             return parameters['next_url']
-        args = _sanitize_dict(parameters)
+        args = _sanitize(parameters)
         if id_ is None and obj._urlPlural is not None:
             url = obj._urlPlural % args
         else:
 
@@ -27,9 +27,25 @@
 from httmock import response  # noqa
 from httmock import urlmatch  # noqa
 
+import gitlab
 from gitlab import *  # noqa
 
 
+class TestSanitize(unittest.TestCase):
+    def test_do_nothing(self):
+        self.assertEqual(1, gitlab._sanitize(1))
+        self.assertEqual(1.5, gitlab._sanitize(1.5))
+        self.assertEqual("foo", gitlab._sanitize("foo"))
+
+    def test_slash(self):
+        self.assertEqual("foo%2Fbar", gitlab._sanitize("foo/bar"))
+
+    def test_dict(self):
+        source = {"url": "foo/bar", "id": 1}
+        expected = {"url": "foo%2Fbar", "id": 1}
+        self.assertEqual(expected, gitlab._sanitize(source))
+
+
 class TestGitlabRawMethods(unittest.TestCase):
     def setUp(self):
         self.gl = Gitlab("http://localhost", private_token="private_token",