diff --git a/Library/Homebrew/formula.rb b/Library/Homebrew/formula.rb
index 9048803efb..2b7c2ced24 100644
--- a/Library/Homebrew/formula.rb
+++ b/Library/Homebrew/formula.rb
@@ -529,7 +529,7 @@ class Formula
             puts buf
           end
         ensure
-          rd.close unless rd.closed?
+          rd.close
         end
       else
         pid = fork { exec_cmd(cmd, args, log, logfn) }