diff --git a/HISTORY.md b/HISTORY.md
index e689e70de..85e1347ea 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -6,6 +6,7 @@
 
 ### Fixed
 * Revert recent proxy changes which breaks proxy usage by @andrewdicken-stripe in https://github.com/NetSweet/netsuite/pull/579
+* Define `respond_to?` on `RecordRef` to match `method_missing` behavior (#608)
 
 ### Breaking Changes
 
diff --git a/lib/netsuite/records/record_ref.rb b/lib/netsuite/records/record_ref.rb
index 1ada59644..e5c96c46e 100644
--- a/lib/netsuite/records/record_ref.rb
+++ b/lib/netsuite/records/record_ref.rb
@@ -33,6 +33,11 @@ def method_missing(m, *args, &block)
         end
       end
 
+      def respond_to?(m, include_private = false)
+        return true if attributes.keys.map(&:to_sym).include?(m.to_sym)
+        super
+      end
+
     end
   end
 end
diff --git a/spec/netsuite/records/record_ref_spec.rb b/spec/netsuite/records/record_ref_spec.rb
index 162f33ee9..f8503f3df 100644
--- a/spec/netsuite/records/record_ref_spec.rb
+++ b/spec/netsuite/records/record_ref_spec.rb
@@ -40,8 +40,16 @@
 
     context 'readers' do
       it 'can take on arbitrary attributes into itself on initialization' do
+        expect(record_ref).to respond_to(:name)
+        expect(record_ref).to respond_to('name')
         expect(record_ref.name).to eql('This is a record_ref')
+
+        expect(record_ref).to respond_to(:banana)
+        expect(record_ref).to respond_to('banana')
         expect(record_ref.banana).to eql('for monkeys')
+
+        expect(record_ref).to_not respond_to(:non_existant_field)
+        expect(record_ref).to_not respond_to('non_existant_field')
       end
     end
   end