diff --git a/rest_framework/fields.py b/rest_framework/fields.py
index 1dd666a3c..969800b00 100644
--- a/rest_framework/fields.py
+++ b/rest_framework/fields.py
@@ -547,7 +547,7 @@ class HyperlinkedRelatedField(RelatedField):
         return self.slug_field
 
     def to_native(self, obj):
-        view_namespace = self.view_namespace or getattr(self.parent.opts, 'view_namespace', None)
+        view_namespace = self.view_namespace
         view_name = self.view_name
         if view_namespace:
             view_name = '%(namespace)s:%(name)s' % {'namespace': view_namespace, 'name': view_name}
@@ -659,7 +659,7 @@ class HyperlinkedIdentityField(Field):
     def field_to_native(self, obj, field_name):
         request = self.context.get('request', None)
         format = self.format or self.context.get('format', None)
-        view_namespace = self.view_namespace or getattr(self.parent.opts, 'view_namespace', None)
+        view_namespace = self.view_namespace
         view_name = self.view_name
         if view_namespace:
             view_name = '%(namespace)s:%(name)s' % {'namespace': view_namespace, 'name': view_name}
diff --git a/rest_framework/serializers.py b/rest_framework/serializers.py
index a15b4ef67..b14ce477b 100644
--- a/rest_framework/serializers.py
+++ b/rest_framework/serializers.py
@@ -560,7 +560,9 @@ class HyperlinkedModelSerializer(ModelSerializer):
         queryset = rel._default_manager
         kwargs = {
             'queryset': queryset,
-            'view_name': self._get_default_view_name(rel)
+            'view_name': self._get_default_view_name(rel),
+            # TODO? offer possibility to init related fields with custom namespaces
+            'view_namespace': getattr(self.opts, 'view_namespace', None)
         }
         if to_many:
             return ManyHyperlinkedRelatedField(**kwargs)