diff --git a/lib/rdoc/stats/normal.rb b/lib/rdoc/stats/normal.rb
index ba00b6cbdf..8ad0e453c6 100644
--- a/lib/rdoc/stats/normal.rb
+++ b/lib/rdoc/stats/normal.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: false
-require 'io/console/size'
+require 'io/console'
 
 ##
 # Stats printer that prints just the files being documented with a progress
@@ -23,7 +23,7 @@ def print_file files_so_far, filename
 
     # Print a progress bar, but make sure it fits on a single line. Filename
     # will be truncated if necessary.
-    terminal_width = IO.console_size[1].to_i.nonzero? || 80
+    terminal_width = IO.console.winsize[1].to_i.nonzero? || 80
     max_filename_size = terminal_width - progress_bar.size
 
     if filename.size > max_filename_size then