diff --git a/Formula/lftp.rb b/Formula/lftp.rb
index 6edbc016aa6..7ceb71b6840 100644
--- a/Formula/lftp.rb
+++ b/Formula/lftp.rb
@@ -6,6 +6,9 @@ class Lftp < Formula
   mirror 'ftp://ftp.cs.tu-berlin.de/pub/net/ftp/lftp/lftp-4.4.8.tar.bz2'
   sha1 'c825849d90b8132ed43ea5b73fdbb6a63f3e44de'
 
+  # https://github.com/mxcl/homebrew/issues/18749
+  env :std
+
   depends_on 'pkg-config' => :build
   depends_on 'readline'
   depends_on 'gnutls'