diff --git a/CHANGES.rst b/CHANGES.rst
index 1da042c..44bacac 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -4,9 +4,10 @@ Changelog
 Here you can see the full list of changes between each SQLAlchemy-Utils release.
 
 
-0.30.1 (2015-05-xx)
+0.30.1 (2015-05-05)
 ^^^^^^^^^^^^^^^^^^^
 
+- Fixed GenericRelationshipProperty comparator to work with SA 1.0.x (#139)
 - Make translation_hybrid expression work the same way as SQLAlchemy-i18n translation expressions
 
 
diff --git a/sqlalchemy_utils/generic.py b/sqlalchemy_utils/generic.py
index d117e0c..e466316 100644
--- a/sqlalchemy_utils/generic.py
+++ b/sqlalchemy_utils/generic.py
@@ -94,6 +94,7 @@ class GenericRelationshipProperty(MapperProperty):
     """
 
     def __init__(self, discriminator, id, doc=None):
+        super(GenericRelationshipProperty, self).__init__()
         self._discriminator_col = discriminator
         self._id_cols = id
         self._id = None
@@ -138,10 +139,9 @@ class GenericRelationshipProperty(MapperProperty):
         self.id = list(map(self._column_to_property, self._id_cols))
 
     class Comparator(PropComparator):
-
         def __init__(self, prop, parentmapper):
             self.property = prop
-            self._parentmapper = parentmapper
+            self._parententity = parentmapper
 
         def __eq__(self, other):
             discriminator = six.text_type(type(other).__name__)