diff --git a/templates/configmap-env.yaml b/templates/configmap-env.yaml
index dfc6b56..b36b7dc 100644
--- a/templates/configmap-env.yaml
+++ b/templates/configmap-env.yaml
@@ -50,6 +50,9 @@ data:
   {{- with .Values.mastodon.web_domain }}
   WEB_DOMAIN: {{ . }}
   {{- end }}
+  {{- with .Values.mastodon.alternate_domains }}
+  ALTERNATE_DOMAINS: {{ join "," . }}
+  {{- end }}
   {{- with .Values.mastodon.singleUserMode }}
   SINGLE_USER_MODE: "true"
   {{- end }}
diff --git a/values.yaml b/values.yaml
index 45b43fd..c1d5af7 100644
--- a/values.yaml
+++ b/values.yaml
@@ -44,6 +44,9 @@ mastodon:
   # You must redirect the path LOCAL_DOMAIN/.well-known/ to WEB_DOMAIN/.well-known/ as described
   # Example: mastodon.example.com
   web_domain: null
+  # -- If you have multiple domains pointed at your Mastodon server, this setting will allow Mastodon to recognize
+  # itself when users are addressed using those other domains.
+  alternate_domains: []
   # -- If set to true, the frontpage of your Mastodon server will always redirect to the first profile in the database and registrations will be disabled.
   singleUserMode: false
   # -- Enables "Secure Mode" for more details see: https://docs.joinmastodon.org/admin/config/#authorized_fetch