diff --git a/config/routes/api.rb b/config/routes/api.rb
index 2589a35d4b..dbca958689 100644
--- a/config/routes/api.rb
+++ b/config/routes/api.rb
@@ -9,6 +9,11 @@ Openfoodnetwork::Application.routes.draw do
     constraints FeatureToggleConstraint.new(:dfc_provider) do
       # Mount DFC API endpoints
       #
+      # We're using the DFC Connector which produces DFC v1.7 data but the
+      # DFC prototype is still pointing to the old URL. We keep it for
+      # testing.
+      mount DfcProvider::Engine, at: '/dfc-v1.6/', as: :legacy_dfc_provider_engine
+
       # The DFC API version depends on the version of the
       # datafoodconsortium-connector gem.
       mount DfcProvider::Engine, at: '/dfc-v1.7/'