diff --git a/lib/cask/cli/doctor.rb b/lib/cask/cli/doctor.rb
index 8e013b4eb9..a4d7c6a650 100644
--- a/lib/cask/cli/doctor.rb
+++ b/lib/cask/cli/doctor.rb
@@ -23,6 +23,7 @@ class Cask::CLI::Doctor
     ohai 'Contents of $GEM_PATH Environment Variable:',                 render_env_var( 'GEM_PATH' )
     ohai 'Contents of $BUNDLE_PATH Environment Variable:',              render_env_var( 'BUNDLE_PATH' )
     ohai 'Contents of $PATH Environment Variable:',                     render_env_var( 'PATH' )
+    ohai 'Contents of $SHELL Environment Variable:',                    render_env_var( 'SHELL' )
     ohai 'Contents of Locale Environment Variables:',                 render_with_none( locale_variables )
     ohai 'Running As Privileged User:',                      render_with_none_as_error( privileged_uid )
   end