diff --git a/README.md b/README.md
index 32189175402f6236a236c324d43504ce7ea98cfe..0feba07129eaff0299e07669b16bfce845f41474 100644
--- a/README.md
+++ b/README.md
@@ -109,7 +109,8 @@ XPath               | JSONPath               | Result
 
 Note that `@path` is additionally available for tests against the current path
 as will be any additional variables supplied as properties on the optional
-"sandbox" object option.
+"sandbox" object option, although this was not indicated as part of the
+original specification.
 
 # Development