diff --git a/Library/Homebrew/cmd/bottle.rb b/Library/Homebrew/cmd/bottle.rb
index 043e5202c9..c74bb19217 100644
--- a/Library/Homebrew/cmd/bottle.rb
+++ b/Library/Homebrew/cmd/bottle.rb
@@ -158,7 +158,7 @@ module Homebrew
           safe_system 'tar', 'czf', bottle_path, "#{f.name}/#{f.pkg_version}"
         end
 
-        if File.size?(bottle_path) > 1*1024*1024
+        if bottle_path.size > 1*1024*1024
           ohai "Detecting if #{filename} is relocatable..."
         end