diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9ec8a5551..f27446f36 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -27,6 +27,7 @@ Configuration: `federation_incoming_replies_max_depth` option
 - Admin API: Allow querying user by ID
 - Added synchronization of following/followers counters for external users
 - Configuration: `enabled` option for `Pleroma.Emails.Mailer`, defaulting to `false`.
+- Mastodon API: Add support for categories for custom emojis by reusing the group feature. <https://github.com/tootsuite/mastodon/pull/11196>
 
 ## [1.0.0] - 2019-06-29
 ### Security
diff --git a/lib/pleroma/web/mastodon_api/mastodon_api_controller.ex b/lib/pleroma/web/mastodon_api/mastodon_api_controller.ex
index 82f180635..8c2033c3a 100644
--- a/lib/pleroma/web/mastodon_api/mastodon_api_controller.ex
+++ b/lib/pleroma/web/mastodon_api/mastodon_api_controller.ex
@@ -299,7 +299,9 @@ defmodule Pleroma.Web.MastodonAPI.MastodonAPIController do
         "static_url" => url,
         "visible_in_picker" => true,
         "url" => url,
-        "tags" => tags
+        "tags" => tags,
+        # Assuming that a comma is authorized in the category name
+        "category" => (tags -- ["Custom"]) |> Enum.join(",")
       }
     end)
   end
diff --git a/test/web/mastodon_api/mastodon_api_controller_test.exs b/test/web/mastodon_api/mastodon_api_controller_test.exs
index 64f14f794..8afb1497b 100644
--- a/test/web/mastodon_api/mastodon_api_controller_test.exs
+++ b/test/web/mastodon_api/mastodon_api_controller_test.exs
@@ -2958,6 +2958,7 @@ defmodule Pleroma.Web.MastodonAPI.MastodonAPIControllerTest do
       assert Map.has_key?(emoji, "static_url")
       assert Map.has_key?(emoji, "tags")
       assert is_list(emoji["tags"])
+      assert Map.has_key?(emoji, "category")
       assert Map.has_key?(emoji, "url")
       assert Map.has_key?(emoji, "visible_in_picker")
     end