diff --git a/tool/sync_default_gems.rb b/tool/sync_default_gems.rb
index 58e15848cc..d1b761078e 100755
--- a/tool/sync_default_gems.rb
+++ b/tool/sync_default_gems.rb
@@ -38,7 +38,6 @@ module SyncDefaultGems
     fileutils: 'ruby/fileutils',
     find: "ruby/find",
     forwardable: "ruby/forwardable",
-    getoptlong: "ruby/getoptlong",
     ipaddr: 'ruby/ipaddr',
     irb: 'ruby/irb',
     json: 'flori/json',