diff --git a/lib/rake/file_list.rb b/lib/rake/file_list.rb
index 15ea4b36d..22c339f24 100644
--- a/lib/rake/file_list.rb
+++ b/lib/rake/file_list.rb
@@ -294,7 +294,7 @@ def egrep(pattern, *options)
       matched = 0
       each do |fn|
         begin
-          open(fn, "r", *options) do |inf|
+          File.open(fn, "r", *options) do |inf|
             count = 0
             inf.each do |line|
               count += 1