diff --git a/rest_framework/fields.py b/rest_framework/fields.py
index 8ccd881fb..b01c2d8da 100644
--- a/rest_framework/fields.py
+++ b/rest_framework/fields.py
@@ -1857,4 +1857,4 @@ class ExternalModelField(ModelField):
         super(ExternalModelField, self).__init__(
             model_field=model_name()._meta.get_field(model_field),
             **kwargs
-        )
\ No newline at end of file
+        )
diff --git a/rest_framework/serializers.py b/rest_framework/serializers.py
index 59533be1e..df9b6a270 100644
--- a/rest_framework/serializers.py
+++ b/rest_framework/serializers.py
@@ -57,6 +57,7 @@ from rest_framework.fields import (  # NOQA # isort:skip
     HiddenField, IPAddressField, ImageField, IntegerField, JSONField, ListField,
     ModelField, MultipleChoiceField, NullBooleanField, ReadOnlyField, RegexField,
     SerializerMethodField, SlugField, TimeField, URLField, UUIDField,
+    ExternalModelField
 )
 from rest_framework.relations import (  # NOQA # isort:skip
     HyperlinkedIdentityField, HyperlinkedRelatedField, ManyRelatedField,