1 files changed, 1 insertions, 1 deletions
diff --git a/src/pkl.cc b/src/pkl.cc
index cb654158..0200df7a 100644
--- a/src/pkl.cc
+++ b/src/pkl.cc
@@ -130,7 +130,7 @@ PKL::write_xml (boost::filesystem::path file, shared_ptr<const CertificateChain>
 	cxml::add_text_child(pkl, "IssueDate", _issue_date);
 	cxml::add_text_child(pkl, "Issuer", _issuer);
 	cxml::add_text_child(pkl, "Creator", _creator);
-	if (_group_id) {
+	if (_group_id && _standard == Standard::SMPTE) {
 		cxml::add_text_child(pkl, "GroupId", "urn:uuid:" + *_group_id);
 	}