diff --git a/utils/rtpengine-ng-client b/utils/rtpengine-ng-client
index 546655cc8..9429a18b8 100755
--- a/utils/rtpengine-ng-client
+++ b/utils/rtpengine-ng-client
@@ -59,6 +59,7 @@ my @flags = qw(
 	bidirectional
 	mix
 	unsubscribe
+	strip-extmap
 );
 
 my @string_opts = qw(