diff --git a/app/serializers/rest/instance_serializer.rb b/app/serializers/rest/instance_serializer.rb
index 3f90844c58..eff67cb837 100644
--- a/app/serializers/rest/instance_serializer.rb
+++ b/app/serializers/rest/instance_serializer.rb
@@ -86,7 +86,7 @@ class REST::InstanceSerializer < ActiveModel::Serializer
       },
 
       reaction_deck: {
-        max_items: 16,
+        max_emojis: 16,
       },
 
       reactions: {
diff --git a/app/serializers/rest/v1/instance_serializer.rb b/app/serializers/rest/v1/instance_serializer.rb
index ee2d2814d1..059ce3a4d5 100644
--- a/app/serializers/rest/v1/instance_serializer.rb
+++ b/app/serializers/rest/v1/instance_serializer.rb
@@ -92,7 +92,7 @@ class REST::V1::InstanceSerializer < ActiveModel::Serializer
       },
 
       reaction_deck: {
-        max_items: 16,
+        max_emojis: 16,
       },
 
       reactions: {