diff --git a/Library/Homebrew/cleanup.rb b/Library/Homebrew/cleanup.rb
index 416b7351bc..80a79f7abf 100644
--- a/Library/Homebrew/cleanup.rb
+++ b/Library/Homebrew/cleanup.rb
@@ -109,7 +109,7 @@ module Homebrew
         version ||= basename_str[/\A.*(?:--.*?)*--(.*?)#{Regexp.escape(pathname.extname)}\Z/, 1]
         version ||= basename_str[/\A.*--?(.*?)#{Regexp.escape(pathname.extname)}\Z/, 1]
 
-        return false unless version
+        return false if version.blank?
 
         version = Version.new(version)