diff --git a/codec/h265/lex.go b/codec/h265/lex.go
index 9ee177b9..cf65b3fe 100644
--- a/codec/h265/lex.go
+++ b/codec/h265/lex.go
@@ -133,7 +133,7 @@ func (l *Lexer) handleAggregation(d []byte) {
 			case 2:
 				idx += 2
 			default:
-				idx += 1
+				idx++
 			}
 		}
 		size := int(binary.BigEndian.Uint16(d[idx:]))