diff --git a/pkg/hap/tlv8/tlv8.go b/pkg/hap/tlv8/tlv8.go
index 6efe20a6..7b397b99 100644
--- a/pkg/hap/tlv8/tlv8.go
+++ b/pkg/hap/tlv8/tlv8.go
@@ -112,6 +112,10 @@ func appendValue(b []byte, tag byte, value reflect.Value) ([]byte, error) {
 		v := value.Uint()
 		return append(b, tag, 4, byte(v), byte(v>>8), byte(v>>16), byte(v>>24)), nil
 
+	case reflect.Uint64:
+		v := value.Uint()
+		return binary.LittleEndian.AppendUint64(append(b, tag, 8), v), nil
+
 	case reflect.Float32:
 		v := math.Float32bits(float32(value.Float()))
 		return append(b, tag, 4, byte(v), byte(v>>8), byte(v>>16), byte(v>>24)), nil
@@ -310,6 +314,12 @@ func unmarshalValue(v []byte, value reflect.Value) error {
 		}
 		value.SetUint(uint64(v[0]) | uint64(v[1])<<8 | uint64(v[2])<<16 | uint64(v[3])<<24)
 
+	case reflect.Uint64:
+		if len(v) != 8 {
+			return errors.New("tlv8: wrong size: " + value.Type().Name())
+		}
+		value.SetUint(binary.LittleEndian.Uint64(v))
+
 	case reflect.Float32:
 		f := math.Float32frombits(binary.LittleEndian.Uint32(v))
 		value.SetFloat(float64(f))