diff --git a/pkg/ueps/packet.go b/pkg/ueps/packet.go
index 67886c5..b6394e5 100644
--- a/pkg/ueps/packet.go
+++ b/pkg/ueps/packet.go
@@ -10,11 +10,11 @@ import (
 
 // writeTLV(buffer, TagPayload, oversized) → errTLVValueTooLarge
 // if err == errTLVValueTooLarge { /* value exceeded 255-byte TLV length limit */ }
-var errTLVValueTooLarge = uepsError("TLV value too large for 1-byte length header")
+var errTLVValueTooLarge = sentinelError("TLV value too large for 1-byte length header")
 
-type uepsError string
+type sentinelError string
 
-func (uepsErrorValue uepsError) Error() string { return string(uepsErrorValue) }
+func (sentinelErrorValue sentinelError) Error() string { return string(sentinelErrorValue) }
 
 // writeTLV(buffer, TagVersion, []byte{0x09}); writeTLV(buffer, TagHMAC, hmacSignature); buffer.WriteByte(TagPayload)
 const (
diff --git a/pkg/ueps/reader.go b/pkg/ueps/reader.go
index 1a5accf..3523100 100644
--- a/pkg/ueps/reader.go
+++ b/pkg/ueps/reader.go
@@ -11,11 +11,11 @@ import (
 
 // packet, err := ReadAndVerify(bufio.NewReader(conn), secret)
 // if err == errMissingHMAC { /* no HMAC tag found in frame */ }
-var errMissingHMAC = uepsError("UEPS packet missing HMAC signature")
+var errMissingHMAC = sentinelError("UEPS packet missing HMAC signature")
 
 // packet, err := ReadAndVerify(bufio.NewReader(conn), wrongSecret)
 // if err == errIntegrityViolation { header.ThreatScore += 100; /* reject packet */ }
-var errIntegrityViolation = uepsError("integrity violation: HMAC mismatch")
+var errIntegrityViolation = sentinelError("integrity violation: HMAC mismatch")
 
 // dispatch(packet.Header.IntentID, packet.Header.ThreatScore, packet.Payload)
 type ParsedPacket struct {