diff --git a/errors.go b/errors.go
index fda3c9247cc..602089c935a 100644
--- a/errors.go
+++ b/errors.go
@@ -67,9 +67,4 @@ type DatagramTooLargeError struct {
 	PeerMaxDatagramFrameSize int64
 }
 
-func (e *DatagramTooLargeError) Is(target error) bool {
-	_, ok := target.(*DatagramTooLargeError)
-	return ok
-}
-
 func (e *DatagramTooLargeError) Error() string { return "DATAGRAM frame too large" }