diff --git a/graphene_django/converter.py b/graphene_django/converter.py
index 6792f84..3f8511c 100644
--- a/graphene_django/converter.py
+++ b/graphene_django/converter.py
@@ -10,7 +10,7 @@ from graphql import assert_valid_name
 
 from .compat import ArrayField, HStoreField, JSONField, RangeField
 from .fields import DjangoListField, DjangoConnectionField
-from .utils import get_related_model, import_single_dispatch
+from .utils import import_single_dispatch
 
 singledispatch = import_single_dispatch()
 
@@ -125,7 +125,7 @@ def convert_time_to_string(field, registry=None):
 
 @convert_django_field.register(models.OneToOneRel)
 def convert_onetoone_field_to_djangomodel(field, registry=None):
-    model = get_related_model(field)
+    model = field.related_model
 
     def dynamic_type():
         _type = registry.get_type_for_model(model)
@@ -144,7 +144,7 @@ def convert_onetoone_field_to_djangomodel(field, registry=None):
 @convert_django_field.register(models.ManyToManyRel)
 @convert_django_field.register(models.ManyToOneRel)
 def convert_field_to_list_or_connection(field, registry=None):
-    model = get_related_model(field)
+    model = field.related_model
 
     def dynamic_type():
         _type = registry.get_type_for_model(model)
@@ -170,7 +170,7 @@ def convert_field_to_list_or_connection(field, registry=None):
 @convert_django_field.register(models.OneToOneField)
 @convert_django_field.register(models.ForeignKey)
 def convert_field_to_djangomodel(field, registry=None):
-    model = get_related_model(field)
+    model = field.related_model
 
     def dynamic_type():
         _type = registry.get_type_for_model(model)
diff --git a/graphene_django/utils.py b/graphene_django/utils.py
index 6fc5599..f8d83bf 100644
--- a/graphene_django/utils.py
+++ b/graphene_django/utils.py
@@ -56,13 +56,6 @@ def get_model_fields(model):
     return all_fields
 
 
-def get_related_model(field):
-    if hasattr(field, 'rel'):
-        # Django 1.6, 1.7
-        return field.rel.to
-    return field.related_model
-
-
 def is_valid_django_model(model):
     return inspect.isclass(model) and issubclass(model, models.Model)