diff --git a/jlexer/lexer.go b/jlexer/lexer.go
index 0fd9b12..90525e6 100644
--- a/jlexer/lexer.go
+++ b/jlexer/lexer.go
@@ -649,7 +649,7 @@ func (r *Lexer) Bytes() []byte {
 		return nil
 	}
 	ret := make([]byte, base64.StdEncoding.DecodedLen(len(r.token.byteValue)))
-	len, err := base64.StdEncoding.Decode(ret, r.token.byteValue)
+	n, err := base64.StdEncoding.Decode(ret, r.token.byteValue)
 	if err != nil {
 		r.fatalError = &LexerError{
 			Reason: err.Error(),
@@ -658,7 +658,7 @@ func (r *Lexer) Bytes() []byte {
 	}
 
 	r.consume()
-	return ret[:len]
+	return ret[:n]
 }
 
 // Bool reads a true or false boolean keyword.