diff --git a/codec/h264/lex_test.go b/codec/h264/lex_test.go
index 7e3422ea..46191fbd 100644
--- a/codec/h264/lex_test.go
+++ b/codec/h264/lex_test.go
@@ -252,7 +252,7 @@ type destination [][]byte
 func (d *destination) Write(p []byte) (int, error) {
 	tmp := make([]byte, len(p))
 	copy(tmp, p)
-	*d = append([][]byte(*d), tmp)
+	*d = append(*d, tmp)
 	return len(p), nil
 }