diff --git a/Library/Homebrew/cmd/audit.rb b/Library/Homebrew/cmd/audit.rb
index aeb59e7ebb..90fc7ceb36 100644
--- a/Library/Homebrew/cmd/audit.rb
+++ b/Library/Homebrew/cmd/audit.rb
@@ -219,7 +219,7 @@ class FormulaAuditor
       else
         version_text = s.version unless s.version.detected_from_url?
         version_url = Version.parse(s.url)
-        if version_url == version_text
+        if version_url.to_s == version_text.to_s
           problem "#{spec} version #{version_text} is redundant with version scanned from URL"
         end
       end