diff --git a/lib/schemable/configuration.rb b/lib/schemable/configuration.rb
index 97e75b9..c302e68 100644
--- a/lib/schemable/configuration.rb
+++ b/lib/schemable/configuration.rb
@@ -7,7 +7,8 @@ module Schemable
       :float_as_string,
       :decimal_as_string,
       :custom_type_mappers,
-      :disable_factory_bot
+      :disable_factory_bot,
+      :custom_defined_enum_method
     )
 
     def initialize
@@ -17,6 +18,7 @@ module Schemable
       @custom_type_mappers = {}
       @decimal_as_string = false
       @disable_factory_bot = true
+      @custom_defined_enum_method = nil
     end
 
     def type_mapper(type_name)
diff --git a/sig/schemable/configuration.rbs b/sig/schemable/configuration.rbs
index 74a47ec..46a73e7 100644
--- a/sig/schemable/configuration.rbs
+++ b/sig/schemable/configuration.rbs
@@ -5,6 +5,7 @@ module Schemable
     attr_accessor float_as_string: bool
     attr_accessor decimal_as_string: bool
     attr_accessor disable_factory_bot: bool
+    attr_accessor custom_defined_enum_method: Symbol?
     attr_accessor custom_type_mappers: Hash[Symbol, any]
 
     def initialize: -> void