diff --git a/psi/pmtdescriptor.go b/psi/pmtdescriptor.go
index a573faa..70cf79d 100644
--- a/psi/pmtdescriptor.go
+++ b/psi/pmtdescriptor.go
@@ -80,6 +80,7 @@ const (
 // PmtDescriptor represents operations currently necessary on descriptors found in the PMT
 type PmtDescriptor interface {
 	Tag() uint8
+	Data() []byte
 	Format() string
 	IsIso639LanguageDescriptor() bool
 	IsMaximumBitrateDescriptor() bool
@@ -114,6 +115,10 @@ func (descriptor *pmtDescriptor) Tag() uint8 {
 	return descriptor.tag
 }
 
+func (descriptor *pmtDescriptor) Data() []byte {
+	return descriptor.data
+}
+
 func (descriptor *pmtDescriptor) String() string {
 	return descriptor.decode()
 }