diff --git a/pkg/ueps/packet.go b/pkg/ueps/packet.go
index c0538a8..4a8c158 100644
--- a/pkg/ueps/packet.go
+++ b/pkg/ueps/packet.go
@@ -16,7 +16,7 @@ var errTLVValueTooLarge = packetError("TLV value too large for 1-byte length hea
 // var errVersionMismatch = packetError("UEPS version not 0x09")
 type packetError string
 
-func (e packetError) Error() string { return string(e) }
+func (packetErr packetError) Error() string { return string(packetErr) }
 
 // writeTLV(buffer, TagVersion, []byte{0x09}); writeTLV(buffer, TagHMAC, hmacSignature); buffer.WriteByte(TagPayload)
 const (