diff --git a/doc/changes.rst b/doc/changes.rst
index 98b93f6..0a85801 100644
--- a/doc/changes.rst
+++ b/doc/changes.rst
@@ -8,6 +8,7 @@ Changes
 * Allow disabling complex types auto-register
 * Documentation edits
 * Various documentation build fixes
+* Fix passing Dict and Array based UserType as params
 
 0.6.1 (2014-05-02)
 ------------------
diff --git a/wsme/rest/args.py b/wsme/rest/args.py
index 0c4f6cf..0c6e1c6 100644
--- a/wsme/rest/args.py
+++ b/wsme/rest/args.py
@@ -165,6 +165,14 @@ def dict_from_params(datatype, params, path, hit_paths):
         for key in keys))
 
 
+@from_params.when_type(UserType)
+def usertype_from_params(datatype, params, path, hit_paths):
+    value = from_params(datatype.basetype, params, path, hit_paths)
+    if value is not Unset:
+        return datatype.frombasetype(value)
+    return Unset
+
+
 def args_from_args(funcdef, args, kwargs):
     newargs = []
     for argdef, arg in zip(funcdef.arguments[:len(args)], args):
diff --git a/wsme/tests/test_protocols_commons.py b/wsme/tests/test_protocols_commons.py
index 6a4c1a8..5cb0268 100644
--- a/wsme/tests/test_protocols_commons.py
+++ b/wsme/tests/test_protocols_commons.py
@@ -14,6 +14,10 @@ class MyUserType(UserType):
     basetype = str
 
 
+class DictBasedUserType(UserType):
+    basetype = DictType(int, int)
+
+
 class TestProtocolsCommons(unittest.TestCase):
     def test_from_param_date(self):
         assert from_param(datetime.date, '2008-02-28') == \
@@ -55,6 +59,15 @@ class TestProtocolsCommons(unittest.TestCase):
     def test_from_params_dict_unset(self):
         assert from_params(DictType(int, str), {}, 'a', set()) is Unset
 
+    def test_from_params_usertype(self):
+        value = from_params(
+            DictBasedUserType(),
+            {'a[2]': '2'},
+            'a',
+            set()
+        )
+        self.assertEqual(value, {2: 2})
+
     def test_args_from_args_usertype(self):
 
         class FakeType(UserType):