diff --git a/app/models/exchange.rb b/app/models/exchange.rb
index fe7f04933c..8ad87d5302 100644
--- a/app/models/exchange.rb
+++ b/app/models/exchange.rb
@@ -17,4 +17,5 @@ class Exchange < ActiveRecord::Base
 
   scope :incoming, joins(:order_cycle).where('exchanges.receiver_id = order_cycles.coordinator_id')
   scope :outgoing, joins(:order_cycle).where('exchanges.sender_id   = order_cycles.coordinator_id')
+  scope :with_variant, lambda { |variant| joins(:exchange_variants).where('exchange_variants.variant_id = ?', variant) }
 end
diff --git a/spec/models/exchange_spec.rb b/spec/models/exchange_spec.rb
index 523ee23e5e..ff3829ec67 100644
--- a/spec/models/exchange_spec.rb
+++ b/spec/models/exchange_spec.rb
@@ -60,5 +60,13 @@ describe Exchange do
     it "finds outgoing exchanges" do
       Exchange.outgoing.should == [outgoing_exchange]
     end
+
+    it "finds exchanges with a particular variant" do
+      v = create(:variant)
+      ex = create(:exchange)
+      ex.variants << v
+
+      Exchange.with_variant(v).should == [ex]
+    end
   end
 end