diff --git a/docs/api.md b/docs/api.md
index b4cd003..14a90f6 100644
--- a/docs/api.md
+++ b/docs/api.md
@@ -17,7 +17,7 @@ You can set the filter like this:
 ```
 Expression e = new Parser(reader)
   .withObjectFilter(filter)
-  .parse();
+  .compile();
 ```
 
 The filter can be either a string containing JSLT. The JSLT expression
@@ -25,7 +25,7 @@ needs to return `true` for the object values that should be included.
 So to get the default behaviour you would set the filter to:
 
 ```
-. == null or . == {} or . == []
+. == null or . == {} or . == [] or not(.) == false
 ```
 
 If you simply want no object keys to ever be omitted, set it to: