diff --git a/lib/rdoc/ri/driver.rb b/lib/rdoc/ri/driver.rb
index dd66d532ca..d24f8d5eff 100644
--- a/lib/rdoc/ri/driver.rb
+++ b/lib/rdoc/ri/driver.rb
@@ -1,5 +1,4 @@
 # frozen_string_literal: true
-require 'abbrev'
 require 'optparse'
 
 begin