diff --git a/src/Containers/Microsoft.NET.Build.Containers/Registry.cs b/src/Containers/Microsoft.NET.Build.Containers/Registry.cs
index c7a7e19fda9e..67b17f794a50 100644
--- a/src/Containers/Microsoft.NET.Build.Containers/Registry.cs
+++ b/src/Containers/Microsoft.NET.Build.Containers/Registry.cs
@@ -265,8 +265,6 @@ private async Task<HttpResponseMessage> GetBlobAsync(string repositoryName, stri
     private static string? CreateRidForPlatform(PlatformInformation platform)
     {
         // we only support linux and windows containers explicitly, so anything else we should skip past.
-        // there are theoretically other platforms/architectures that Docker supports (s390x?), but we are
-        // deliberately ignoring them without clear user signal.
         var osPart = platform.os switch
         {
             "linux" => "linux",
@@ -286,6 +284,8 @@ private async Task<HttpResponseMessage> GetBlobAsync(string repositoryName, stri
             "x386" => "x86",
             "arm" => $"arm{(platform.variant != "v7" ? platform.variant : "")}",
             "arm64" => "arm64",
+            "ppc64le" => "ppc64le",
+            "s390x" => "s390x",
             _ => null
         };