diff --git a/packages/@angular/cli/commands/xi18n.ts b/packages/@angular/cli/commands/xi18n.ts
index afaea034de80..9083ffa48ec6 100644
--- a/packages/@angular/cli/commands/xi18n.ts
+++ b/packages/@angular/cli/commands/xi18n.ts
@@ -17,7 +17,7 @@ const Xi18nCommand = Command.extend({
       name: 'i18n-format',
       type: String,
       default: 'xlf',
-      aliases: ['f', {'xmb': 'xmb'}, {'xlf': 'xlf'}, {'xliff': 'xlf'}],
+      aliases: ['f', {'xmb': 'xmb'}, {'xlf': 'xlf'}, {'xliff': 'xlf'}, {'xliff2': 'xliff2'} ],
       description: 'Output format for the generated file.'
     },
     {