diff --git a/autoware-nightly.repos b/autoware-nightly.repos
index e369eba8299..7771826d2d7 100644
--- a/autoware-nightly.repos
+++ b/autoware-nightly.repos
@@ -15,6 +15,10 @@ repositories:
     type: git
     url: https://github.com/autowarefoundation/autoware.universe.git
     version: main
+  universe/external/tier4_ad_api_adaptor: # TODO(TIER IV): Migrate to AD API and remove this repository entry.
+    type: git
+    url: https://github.com/tier4/tier4_ad_api_adaptor.git
+    version: tier4/universe
   launcher/autoware_launch:
     type: git
     url: https://github.com/autowarefoundation/autoware_launch.git