diff --git a/rtmp/amf/amf.go b/rtmp/amf/amf.go
index c6806ad9..55a656fc 100644
--- a/rtmp/amf/amf.go
+++ b/rtmp/amf/amf.go
@@ -44,28 +44,28 @@ import (
 	"math"
 )
 
-// AMF data types.
+// AMF data types, as defined by the AMF specification.
 // NB: we export these sparingly.
 const (
-	typeNumber = iota
-	typeBoolean
-	typeString
-	TypeObject
-	typeMovieClip
-	TypeNull
-	typeUndefined
-	typeReference
-	typeEcmaArray
-	TypeObjectEnd
-	typeStrictArray
-	typeDate
-	typeLongString
-	typeUnsupported
-	typeRecordset
-	typeXmlDoc
-	typeTypedObject
-	typeAvmplus
-	typeInvalid = 0xff
+	typeNumber      = 0x00
+	typeBoolean     = 0x01
+	typeString      = 0x02
+	TypeObject      = 0x03
+	typeMovieClip   = 0x04
+	TypeNull        = 0x05
+	typeUndefined   = 0x06
+	typeReference   = 0x07
+	typeEcmaArray   = 0x08
+	TypeObjectEnd   = 0x09
+	typeStrictArray = 0x0A
+	typeDate        = 0x0B
+	typeLongString  = 0x0C
+	typeUnsupported = 0x0D
+	typeRecordset   = 0x0E
+	typeXmlDoc      = 0x0F
+	typeTypedObject = 0x10
+	typeAvmplus     = 0x11
+	typeInvalid     = 0xff
 )
 
 // AMF represents an AMF message (object), which is simply a collection of properties.
@@ -479,7 +479,7 @@ func Decode(obj *Object, buf []byte, decodeName bool) (int, error) {
 
 // GetProp returns an object's property, either by its index when idx is non-negative, or by its name otherwise.
 // If the requested property is not found an ErrPropertyNotFound error is returned.
-func (obj *Object)GetProp(name string, idx int) (*Property, error) {
+func (obj *Object) GetProp(name string, idx int) (*Property, error) {
 	if idx >= 0 {
 		if idx < len(obj.Props) {
 			return &obj.Props[idx], nil