diff --git a/zerver/models.py b/zerver/models.py
index a7495afb4f..3f9a0bb094 100644
--- a/zerver/models.py
+++ b/zerver/models.py
@@ -383,7 +383,7 @@ class RealmEmoji(ModelReprMixin, models.Model):
 
     def __unicode__(self):
         # type: () -> Text
-        return u"<RealmEmoji(%s): %s %s>" % (self.realm.domain, self.name, self.img_url)
+        return u"<RealmEmoji(%s): %s %s>" % (self.realm.string_id, self.name, self.img_url)
 
 def get_realm_emoji_uncached(realm):
     # type: (Realm) -> Dict[Text, Optional[Dict[str, Text]]]
diff --git a/zerver/tests/test_realm_emoji.py b/zerver/tests/test_realm_emoji.py
index d4e1c54539..bbceb2ecdc 100644
--- a/zerver/tests/test_realm_emoji.py
+++ b/zerver/tests/test_realm_emoji.py
@@ -65,7 +65,7 @@ class RealmEmojiTest(ZulipTestCase):
         realm_emoji = RealmEmoji.objects.get(realm=get_realm('zulip'))
         self.assertEqual(
             str(realm_emoji),
-            '<RealmEmoji(zulip.com): my_emoji https://example.com/my_emoji>'
+            '<RealmEmoji(zulip): my_emoji https://example.com/my_emoji>'
         )
 
     def test_upload_exception(self):