diff --git a/Creating-and-Installing-Add-ons.textile b/Creating-and-Installing-Add-ons.textile
index c0383fb..ccfac0d 100644
--- a/Creating-and-Installing-Add-ons.textile
+++ b/Creating-and-Installing-Add-ons.textile
@@ -63,8 +63,10 @@ variables including the following documented in todo.sh's usage message:
 and the following environmental variables not documented in the usage
 message:
 
-* TODO_SH -- complete path to calling Todo.sh script
+* TODO_SH -- filename for the todo.sh script
+* TODO_FULL_SH -- complete path to calling todo.sh script
 * TODOTXT_CFG_FILE -- complete path to user's todo.sh configuration file
+* TODO_DIR -- complete path to the todo.txt file
 
 h2. [[Creating Add-ons: Examples]]