diff --git a/app/models/concerns/account/attribution_domains.rb b/app/models/concerns/account/attribution_domains.rb
index 5f4d9afabfc..22bf27cc5dd 100644
--- a/app/models/concerns/account/attribution_domains.rb
+++ b/app/models/concerns/account/attribution_domains.rb
@@ -3,10 +3,12 @@
 module Account::AttributionDomains
   extend ActiveSupport::Concern
 
+  ATTRIBUTION_DOMAINS_LIMIT = 100
+
   included do
     normalizes :attribution_domains, with: ->(arr) { arr.filter_map { |str| str.to_s.strip.delete_prefix('http://').delete_prefix('https://').delete_prefix('*.').presence }.uniq }
 
-    validates :attribution_domains, domain: true, length: { maximum: 100 }, if: -> { local? && will_save_change_to_attribution_domains? }
+    validates :attribution_domains, domain: true, length: { maximum: ATTRIBUTION_DOMAINS_LIMIT }, if: -> { local? && will_save_change_to_attribution_domains? }
   end
 
   def can_be_attributed_from?(domain)
diff --git a/spec/models/account_spec.rb b/spec/models/account_spec.rb
index 8ce337f1c74..be400fecd4a 100644
--- a/spec/models/account_spec.rb
+++ b/spec/models/account_spec.rb
@@ -506,6 +506,8 @@ RSpec.describe Account do
     context 'when account is local' do
       subject { Fabricate.build :account, domain: nil }
 
+      let(:domains_limit) { described_class::ATTRIBUTION_DOMAINS_LIMIT }
+
       context 'with an existing differently-cased username account' do
         before { Fabricate :account, username: 'the_doctor' }
 
@@ -547,8 +549,8 @@ RSpec.describe Account do
       it { is_expected.to validate_absence_of(:shared_inbox_url).on(:create) }
       it { is_expected.to validate_absence_of(:uri).on(:create) }
 
-      it { is_expected.to allow_values([], ['example.com'], (1..100).to_a).for(:attribution_domains) }
-      it { is_expected.to_not allow_values(['example com'], ['@'], (1..101).to_a).for(:attribution_domains) }
+      it { is_expected.to allow_values([], ['example.com'], (1..domains_limit).to_a).for(:attribution_domains) }
+      it { is_expected.to_not allow_values(['example com'], ['@'], (1..(domains_limit + 1)).to_a).for(:attribution_domains) }
     end
 
     context 'when account is remote' do