diff --git a/.pycodestyle.ini b/.pycodestyle.ini
index 85baad5..2326271 100644
--- a/.pycodestyle.ini
+++ b/.pycodestyle.ini
@@ -3,6 +3,7 @@
 # E401 multiple imports on one line (checked by PyLint)
 # E402 module level import not at top of file (checked by PyLint)
 # E501: line too long (checked by PyLint)
+# E701: multiple statements on one line (used to shorten test syntax)
 # E711: comparison to None (used to improve test style)
 # E712: comparison to True (used to improve test style)
-ignore = E401,E402,E501,E711,E712
+ignore = E401,E402,E501,E701,E711,E712
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6451976..ebd18f9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,7 @@
 
 - Removed warnings about calling save/load unnecessarily.
 - Allow keyword arguments to be passed to class construction via `new` and `find` utilities.
+- Fixed missing attributes added in `__init__` on `AttributeDictionary`.
 
 ## 1.3 (2017/01/24)
 
diff --git a/yorm/__init__.py b/yorm/__init__.py
index 18a850f..5b67c6d 100644
--- a/yorm/__init__.py
+++ b/yorm/__init__.py
@@ -8,4 +8,4 @@
 from .mixins import ModelMixin
 
 __project__ = 'YORM'
-__version__ = '1.4dev4'
+__version__ = '1.4dev5'
diff --git a/yorm/tests/test_types_extended.py b/yorm/tests/test_types_extended.py
index 48d0381..a883f91 100644
--- a/yorm/tests/test_types_extended.py
+++ b/yorm/tests/test_types_extended.py
@@ -54,14 +54,21 @@ def it_converts_correctly(value, data):
 
 def describe_attribute_dictionary():
 
-    @attr(var1=Integer)
-    @attr(var2=String)
-    class SampleAttributeDictionary(AttributeDictionary):
-        """Sample attribute dictionary."""
+    @pytest.fixture
+    def cls():
+        @attr(var1=Integer)
+        @attr(var2=String)
+        class SampleAttributeDictionary(AttributeDictionary): pass
+        return SampleAttributeDictionary
 
     @pytest.fixture
-    def converter():
-        return SampleAttributeDictionary()
+    def cls_with_init():
+        @attr(var1=Integer)
+        class SampleAttributeDictionaryWithInit(AttributeDictionary):
+            def __init__(self, *args, var2="2", **kwargs):
+                super().__init__(*args, **kwargs)
+                self.var2 = var2
+        return SampleAttributeDictionaryWithInit
 
     def it_cannot_be_used_directly():
         with expect.raises(NotImplementedError):
@@ -69,8 +76,20 @@ def it_cannot_be_used_directly():
         with expect.raises(NotImplementedError):
             AttributeDictionary.to_data(None)
 
-    def it_has_keys_available_as_attributes(converter):
+    def it_has_keys_available_as_attributes(cls):
+        converter = cls()
+
         value = converter.to_value({'var1': 1, 'var2': "2"})
+
+        expect(value.var1) == 1
+        expect(value.var2) == "2"
+
+    def it_adds_extra_attributes_from_init(cls_with_init):
+        converter = cls_with_init()
+
+        value = converter.to_value({'var1': 1})
+        print(value.__dict__)
+
         expect(value.var1) == 1
         expect(value.var2) == "2"
 
diff --git a/yorm/types/extended.py b/yorm/types/extended.py
index 7d47a4d..ce5fca6 100644
--- a/yorm/types/extended.py
+++ b/yorm/types/extended.py
@@ -145,9 +145,7 @@ def create_default(cls):
             msg = "AttributeDictionary class must be subclassed to use"
             raise NotImplementedError(msg)
 
-        obj = cls.__new__(cls)
-        obj.__dict__ = obj
-        return obj
+        return cls()
 
 
 class SortedList(List):