diff --git a/hsp/constants.go b/hsp/constants.go
index 4b87548..6b3b42e 100644
--- a/hsp/constants.go
+++ b/hsp/constants.go
@@ -6,6 +6,9 @@ import (
 	"strings"
 )
 
+// DO NOT CHANGE THIS
+const HSP_PORT = "998"
+
 const (
 	H_STATUS = "status"
 	H_DATA_FORMAT = "data-format"
@@ -70,3 +73,10 @@ func ParseDataFormat(format string) (*DataFormat, error) {
 	}, nil
 }
 
+func (df *DataFormat) String() string {
+	if df.Format == DF_BYTES {
+		return df.Format
+	}
+	return fmt.Sprintf("%s:%s", df.Format, df.Encoding)
+}
+