diff --git a/pkg/ueps/packet.go b/pkg/ueps/packet.go
index 48818cd..aee901a 100644
--- a/pkg/ueps/packet.go
+++ b/pkg/ueps/packet.go
@@ -24,8 +24,8 @@ const (
 	TagTargetLayer  = 0x03
 	TagIntent      = 0x04
 	TagThreatScore = 0x05
-	TagHMAC        = 0x06 // writeTLV(buf, TagHMAC, hmacSignature) — covers all preceding header TLVs + payload
-	TagPayload     = 0xFF // buf.WriteByte(TagPayload); buf.Write(rawPayload) — no length prefix
+	TagHMAC        = 0x06 // writeTLV(buffer, TagHMAC, hmacSignature) — covers all preceding header TLVs + payload
+	TagPayload     = 0xFF // buffer.WriteByte(TagPayload); buffer.Write(rawPayload) — no length prefix
 )
 
 // header := ueps.UEPSHeader{Version: 0x09, CurrentLayer: 5, TargetLayer: 3, IntentID: 0x01, ThreatScore: 0}