diff --git a/app/controllers/api/variants_controller.rb b/app/controllers/api/variants_controller.rb
index 14575bbabc..c60aa8f7b5 100644
--- a/app/controllers/api/variants_controller.rb
+++ b/app/controllers/api/variants_controller.rb
@@ -6,12 +6,12 @@ module Api
     before_filter :product
 
     def index
-      @variants = scope.includes(:option_values).ransack(params[:q]).result
+      @variants = scope.includes(option_values: :option_type).ransack(params[:q]).result
       render json: @variants, each_serializer: Api::VariantSerializer
     end
 
     def show
-      @variant = scope.includes(:option_values).find(params[:id])
+      @variant = scope.includes(option_values: :option_type).find(params[:id])
       render json: @variant, serializer: Api::VariantSerializer
     end