diff --git a/graphene/generators/__init__.py b/graphene/generators/__init__.py
index c9626f08..1f46ebc6 100644
--- a/graphene/generators/__init__.py
+++ b/graphene/generators/__init__.py
@@ -1,4 +1,4 @@
-from .definitions import GrapheneInterfaceType, GrapheneObjectType, GrapheneScalarType, GrapheneEnumType
+from .definitions import GrapheneInterfaceType, GrapheneObjectType, GrapheneScalarType, GrapheneEnumType, GrapheneInputObjectType
 from .utils import values_from_enum
 
 
@@ -42,3 +42,12 @@ def generate_enum(enum):
         name=enum._meta.name or enum.__name__,
         description=enum._meta.description or enum.__doc__,
     )
+
+
+def generate_inputobjecttype(inputobjecttype):
+    return GrapheneInputObjectType(
+        graphene_type=inputobjecttype,
+        name=inputobjecttype._meta.name or inputobjecttype.__name__,
+        description=inputobjecttype._meta.description or inputobjecttype.__doc__,
+        fields=inputobjecttype._meta.get_fields,
+    )
diff --git a/graphene/generators/definitions.py b/graphene/generators/definitions.py
index 423c14e3..70eba044 100644
--- a/graphene/generators/definitions.py
+++ b/graphene/generators/definitions.py
@@ -1,4 +1,4 @@
-from graphql import GraphQLObjectType, GraphQLInterfaceType, GraphQLScalarType, GraphQLEnumType
+from graphql import GraphQLObjectType, GraphQLInterfaceType, GraphQLScalarType, GraphQLEnumType, GraphQLInputObjectType
 
 
 class GrapheneGraphQLType(object):
@@ -35,3 +35,7 @@ class GrapheneScalarType(GrapheneGraphQLType, GraphQLScalarType):
 
 class GrapheneEnumType(GrapheneGraphQLType, GraphQLEnumType):
     pass
+
+
+class GrapheneInputObjectType(GrapheneGraphQLType, GraphQLInputObjectType):
+    pass
diff --git a/graphene/types/inputobjecttype.py b/graphene/types/inputobjecttype.py
index b5398497..40549994 100644
--- a/graphene/types/inputobjecttype.py
+++ b/graphene/types/inputobjecttype.py
@@ -1,19 +1,15 @@
 import six
 
-from graphql import GraphQLInputObjectType
-
 from ..utils.copy_fields import copy_fields
 from ..utils.get_fields import get_fields
 from ..utils.is_base_type import is_base_type
-from .definitions import GrapheneGraphQLType
 from .field import InputField
 from .objecttype import attrs_without_fields
 from .options import Options
 from .unmountedtype import UnmountedType
 
 
-class GrapheneInputObjectType(GrapheneGraphQLType, GraphQLInputObjectType):
-    pass
+from ..generators import generate_inputobjecttype
 
 
 class InputObjectTypeMeta(type):
@@ -39,12 +35,8 @@ class InputObjectTypeMeta(type):
 
         if not options.graphql_type:
             fields = copy_fields(InputField, fields, parent=cls)
-            options.graphql_type = GrapheneInputObjectType(
-                graphene_type=cls,
-                name=options.name or cls.__name__,
-                description=options.description or cls.__doc__,
-                fields=fields,
-            )
+            options.get_fields = lambda: fields
+            options.graphql_type = generate_inputobjecttype(cls)
         else:
             assert not fields, "Can't mount InputFields in an InputObjectType with a defined graphql_type"
             fields = copy_fields(InputField, options.graphql_type.get_fields(), parent=cls)