diff --git a/src/ai/backend/common/docker.py b/src/ai/backend/common/docker.py
index c6bf62ee21e..96f3be562b3 100644
--- a/src/ai/backend/common/docker.py
+++ b/src/ai/backend/common/docker.py
@@ -250,6 +250,8 @@ async def login(
         return {"auth": basic_auth, "headers": {}}
     elif ping_status == 404:
         raise RuntimeError(f"Unsupported docker registry: {registry_url}! (API v2 not implemented)")
+    # Check also 400 response since the AWS ECR Public server returns a 400 response
+    # when given invalid credential authorization.
     elif ping_status in [400, 401]:
         params = {
             "scope": scope,