diff --git a/convert/convert.go b/convert/convert.go
index 7b9fe31ff..a31b0d6c7 100644
--- a/convert/convert.go
+++ b/convert/convert.go
@@ -201,7 +201,7 @@ func ConvertModel(fsys fs.FS, ws io.WriteSeeker) error {
 	case "CohereForCausalLM":
 		conv = &commandrModel{}
 	default:
-		return errors.New("unsupported architecture")
+		return fmt.Errorf("unsupported architecture %q", p.Architectures[0])
 	}
 
 	if err := json.Unmarshal(bts, conv); err != nil {