diff --git a/protocol/match.go b/protocol/match.go
index 812a4c1..9d64e4e 100644
--- a/protocol/match.go
+++ b/protocol/match.go
@@ -9,6 +9,9 @@ package protocol
 //
 // Returns true if all magic bytes are matched, even if input has extra bytes.
 func Match(magic string, input []byte) bool {
+	if len(magic) == 0 {
+		return true
+	}
 	return match(magic, input, 0, 0)
 }