diff --git a/plugins/knife/_knife b/plugins/knife/_knife
index ca6347957..9f5b406af 100644
--- a/plugins/knife/_knife
+++ b/plugins/knife/_knife
@@ -1,5 +1,10 @@
 #compdef knife
 
+# You can override the path to knife.rb and your cookbooks by setting
+# KNIFE_CONF_PATH=/path/to/my/.chef/knife.rb
+# KNIFE_COOKBOOK_PATH=/path/to/my/chef/cookbooks
+# Read around where these are used for more detail.
+
 # These flags should be available everywhere according to man knife
 knife_general_flags=( --help --server-url --key --config --editor --format --log_level --logfile --no-editor --user --print-after --version --yes )