diff --git a/Formula/charm-tools.rb b/Formula/charm-tools.rb
index 01ca4a139a..01c5da20af 100644
--- a/Formula/charm-tools.rb
+++ b/Formula/charm-tools.rb
@@ -5,7 +5,7 @@ class CharmTools < Formula
   homepage "https://github.com/juju/charm-tools"
   url "https://files.pythonhosted.org/packages/99/4d/16d7398fe5eefc602a8870fb3e93597aabe681b0f1497749148695cba4a1/charm-tools-2.2.3.tar.gz"
   sha256 "ea659f59041cb3dff0be862d657830591e656a9a259931064edab7477875245b"
-  revision 2
+  revision 3
 
   bottle do
     cellar :any
@@ -247,6 +247,7 @@ class CharmTools < Formula
   end
 
   def install
+    ENV.prepend_path "PATH", "/System/Library/Frameworks/Python.framework/Versions/Current/bin"
     ENV.prepend "CPPFLAGS", "-I#{MacOS.sdk_path}/usr/include/ffi"
 
     virtualenv_install_with_resources