diff --git a/pkg/ueps/reader.go b/pkg/ueps/reader.go
index ce21406..d3a3aeb 100644
--- a/pkg/ueps/reader.go
+++ b/pkg/ueps/reader.go
@@ -10,11 +10,11 @@ import (
 )
 
 // packet, err := ReadAndVerify(bufio.NewReader(conn), secret)
-// if errors.Is(err, errMissingHMAC) { /* no HMAC tag found in frame */ }
+// if err == errMissingHMAC { /* no HMAC tag found in frame */ }
 var errMissingHMAC = tlvError("UEPS packet missing HMAC signature")
 
 // packet, err := ReadAndVerify(bufio.NewReader(conn), wrongSecret)
-// if errors.Is(err, errIntegrityViolation) { /* HMAC mismatch — threat score incremented */ }
+// if err == errIntegrityViolation { /* HMAC mismatch — threat score incremented */ }
 var errIntegrityViolation = tlvError("integrity violation: HMAC mismatch (ThreatScore +100)")
 
 // packet, err := ueps.ReadAndVerify(bufio.NewReader(conn), sharedSecret)