diff --git a/graphene/core/fields.py b/graphene/core/fields.py
index 9c883567..b6b34334 100644
--- a/graphene/core/fields.py
+++ b/graphene/core/fields.py
@@ -144,7 +144,7 @@ class Field(object):
         return NotImplemented
 
     def __hash__(self):
-        return hash(self.creation_counter)
+        return hash((self.creation_counter, self.object_type))
 
     def __copy__(self):
         # We need to avoid hitting __reduce__, so define this