diff --git a/wsme/tests/test_types.py b/wsme/tests/test_types.py
index ada0e81..a5b49bf 100644
--- a/wsme/tests/test_types.py
+++ b/wsme/tests/test_types.py
@@ -154,3 +154,20 @@ class TestTypes(unittest.TestCase):
             assert False, 'ValueError was not raised'
         except ValueError, e:
             assert str(e) == "Value 'v3' is invalid (should be one of: v1, v2)"
+
+    def test_attribute_validation(self):
+        class AType(object):
+            alist = [int]
+            aint = int
+
+        types.register_type(AType)
+
+        obj = AType()
+
+        obj.alist = [1, 2, 3]
+        assert obj.alist == [1, 2, 3]
+        obj.aint = 5
+        assert obj.aint == 5
+
+        self.assertRaises(ValueError, setattr, obj, 'alist', 12)
+        self.assertRaises(ValueError, setattr, obj, 'alist', [2, 'a'])
diff --git a/wsme/types.py b/wsme/types.py
index bbf3736..aad38ae 100644
--- a/wsme/types.py
+++ b/wsme/types.py
@@ -87,16 +87,27 @@ def iscomplex(datatype):
     return hasattr(datatype, '_wsme_attributes')
 
 
+def isarray(datatype):
+    return isinstance(datatype, list)
+
+
 def validate_value(datatype, value):
-    print datatype
     if hasattr(datatype, 'validate'):
         return datatype.validate(value)
     else:
-        if value is not None and not isinstance(value, datatype):
-            raise ValueError(
-                "Wrong type. Expected '%s', got '%s'" % (
-                    datatype, type(value)
-                ))
+        if value is not None:
+            if isarray(datatype):
+                if not isinstance(value, list):
+                    raise ValueError("Wrong type. Expected '%s', got '%s'" % (
+                            datatype, type(value)
+                        ))
+                for item in value:
+                    validate_value(datatype[0], item)
+            elif not isinstance(value, datatype):
+                raise ValueError(
+                    "Wrong type. Expected '%s', got '%s'" % (
+                        datatype, type(value)
+                    ))
 
 
 class wsproperty(property):