diff --git a/app/models/account.rb b/app/models/account.rb
index b10b2af423..41b781bbe5 100644
--- a/app/models/account.rb
+++ b/app/models/account.rb
@@ -72,6 +72,7 @@ class Account < ApplicationRecord
   URL_PREFIX_RE = %r{\Ahttp(s?)://[^/]+}
   USERNAME_ONLY_RE = /\A#{USERNAME_RE}\z/i
   USERNAME_LENGTH_LIMIT = 30
+  DISPLAY_NAME_LENGTH_LIMIT = 30
 
   include Attachmentable # Load prior to Avatar & Header concerns
 
@@ -103,7 +104,7 @@ class Account < ApplicationRecord
   # Local user validations
   validates :username, format: { with: /\A[a-z0-9_]+\z/i }, length: { maximum: USERNAME_LENGTH_LIMIT }, if: -> { local? && will_save_change_to_username? && actor_type != 'Application' }
   validates_with UnreservedUsernameValidator, if: -> { local? && will_save_change_to_username? && actor_type != 'Application' }
-  validates :display_name, length: { maximum: 30 }, if: -> { local? && will_save_change_to_display_name? }
+  validates :display_name, length: { maximum: DISPLAY_NAME_LENGTH_LIMIT }, if: -> { local? && will_save_change_to_display_name? }
   validates :note, note_length: { maximum: 500 }, if: -> { local? && will_save_change_to_note? }
   validates :fields, length: { maximum: DEFAULT_FIELDS_SIZE }, if: -> { local? && will_save_change_to_fields? }
   validates :uri, absence: true, if: :local?, on: :create