diff --git a/pkg/sfu/forwarder.go b/pkg/sfu/forwarder.go
index 79d0c2ee5..7abc6ebb4 100644
--- a/pkg/sfu/forwarder.go
+++ b/pkg/sfu/forwarder.go
@@ -1748,6 +1748,9 @@ func (f *Forwarder) getTranslationParamsVideo(extPkt *buffer.ExtPacket, layer in
 }
 
 func (f *Forwarder) TranslateCodecHeader(extPkt *buffer.ExtPacket, tpr *TranslationParamsRTP, outputBuffer []byte) (bool, int, int, error) {
+	f.lock.Lock()
+	defer f.lock.Unlock()
+
 	maybeRollback := func(isSwitching bool) {
 		if isSwitching {
 			f.vls.Rollback()