lib/rack/conditionalget.rb in rack-1.3.2 vs lib/rack/conditionalget.rb in rack-1.3.3

@@ -54,9 +54,10 @@
       etag = headers['ETag'] and etag == none_match
     end
 
     def modified_since?(modified_since, headers)
       last_modified = to_rfc2822(headers['Last-Modified']) and
+        modified_since and
         modified_since >= last_modified
     end
 
     def to_rfc2822(since)
       Time.rfc2822(since) rescue nil