diff --git a/Formula/vmalloc.rb b/Formula/vmalloc.rb
index 71304aa364..40c6aaf3f6 100644
--- a/Formula/vmalloc.rb
+++ b/Formula/vmalloc.rb
@@ -1,7 +1,6 @@
 require 'formula'
-require 'download_strategy'
 
-class VmallocDownloadStrategy <CurlDownloadStrategy
+class VmallocDownloadStrategy < CurlDownloadStrategy
   def _fetch
     # downloading from AT&T requires using the following credentials
     credentials = 'I accept www.opensource.org/licenses/cpl:.'