diff --git a/app/models/spree/order_populator_decorator.rb b/app/models/spree/order_populator_decorator.rb
index 32d6afe12d..e9e3f0d0ed 100644
--- a/app/models/spree/order_populator_decorator.rb
+++ b/app/models/spree/order_populator_decorator.rb
@@ -76,7 +76,7 @@ Spree::OrderPopulator.class_eval do
   end
 
   def variants_removed(variants_data)
-    variant_ids_given = variants_data.map { |data| data[:variant_id] }
+    variant_ids_given = variants_data.map { |data| data[:variant_id].to_i }
 
     (variant_ids_in_cart - variant_ids_given).uniq
   end
diff --git a/spec/models/spree/order_populator_spec.rb b/spec/models/spree/order_populator_spec.rb
index 1e6e06677d..2ea77b5b5c 100644
--- a/spec/models/spree/order_populator_spec.rb
+++ b/spec/models/spree/order_populator_spec.rb
@@ -100,12 +100,12 @@ module Spree
 
       it "returns nothing when all items in the cart are provided" do
         op.stub(:variant_ids_in_cart) { [123] }
-        op.send(:variants_removed, [{variant_id: 123}]).should == []
+        op.send(:variants_removed, [{variant_id: '123'}]).should == []
       end
 
       it "returns nothing when items are added to cart" do
         op.stub(:variant_ids_in_cart) { [123] }
-        op.send(:variants_removed, [{variant_id: 123}, {variant_id: 456}]).should == []
+        op.send(:variants_removed, [{variant_id: '123'}, {variant_id: '456'}]).should == []
       end
 
       it "does not return duplicates" do