diff --git a/rtmp/amf/amf.go b/rtmp/amf/amf.go
index 55a656fc..9f410e69 100644
--- a/rtmp/amf/amf.go
+++ b/rtmp/amf/amf.go
@@ -264,10 +264,6 @@ func EncodeNamedBoolean(buf []byte, key string, val bool) ([]byte, error) {
 
 // PropEncode encodes a property.
 func PropEncode(p *Property, buf []byte) ([]byte, error) {
-	if p.Type == typeInvalid {
-		return nil, ErrShortBuffer
-	}
-
 	if p.Type != TypeNull && len(p.Name)+2+1 >= len(buf) {
 		return nil, ErrShortBuffer
 	}