diff --git a/tools/addlatexhash.dart b/tools/addlatexhash.dart
index c48fa6b7bde..cbdc349ba12 100755
--- a/tools/addlatexhash.dart
+++ b/tools/addlatexhash.dart
@@ -25,7 +25,6 @@
 // source file receieved as input; it will not work with other styles.
 
 import 'dart:io';
-import 'dart:convert';
 
 import 'package:crypto/crypto.dart';
 import 'package:convert/convert.dart';