diff --git a/app/models/instance_info.rb b/app/models/instance_info.rb
index 79c70fe06f1393..62da02a743fb3b 100644
--- a/app/models/instance_info.rb
+++ b/app/models/instance_info.rb
@@ -40,6 +40,7 @@ def self.fetch_emoji_reaction_available(domain)
     return false if info.nil?
 
     return true if EMOJI_REACTION_AVAILABLE_SOFTWARES.include?(info['software'])
+    return false if info.data['metadata'].nil? || !info.data['metadata'].is_a?(Hash)
 
     features = info.data.dig('metadata', 'features')
     return false if features.nil? || !features.is_a?(Array)
diff --git a/spec/models/status_spec.rb b/spec/models/status_spec.rb
index 5036777c8249b6..ba8b370d721fa0 100644
--- a/spec/models/status_spec.rb
+++ b/spec/models/status_spec.rb
@@ -463,7 +463,7 @@
   describe '.emoji_reaction_availables_map' do
     subject { described_class.emoji_reaction_availables_map(domains) }
 
-    let(:domains) { %w(features_available.com features_unavailable.com features_invalid.com features_nil.com no_info.com mastodon.com misskey.com) }
+    let(:domains) { %w(features_available.com features_unavailable.com features_invalid.com features_nil.com no_info.com mastodon.com misskey.com old_mastodon.com) }
 
     before do
       Fabricate(:instance_info, domain: 'features_available.com', software: 'mastodon', data: { metadata: { features: ['emoji_reaction'] } })
@@ -472,6 +472,7 @@
       Fabricate(:instance_info, domain: 'features_nil.com', software: 'mastodon', data: { metadata: { features: nil } })
       Fabricate(:instance_info, domain: 'mastodon.com', software: 'mastodon')
       Fabricate(:instance_info, domain: 'misskey.com', software: 'misskey')
+      Fabricate(:instance_info, domain: 'old_mastodon.com', software: 'mastodon', data: { metadata: [] })
     end
 
     it 'availables if features contains emoji_reaction' do
@@ -497,6 +498,10 @@
     it 'availables if misskey server' do
       expect(subject['misskey.com']).to be true
     end
+
+    it 'unavailables if old mastodon server' do
+      expect(subject['old_mastodon.com']).to be false
+    end
   end
 
   describe '.tagged_with' do