diff --git a/book/validation.rst b/book/validation.rst
index ca2880f5881..4168ae079bb 100644
--- a/book/validation.rst
+++ b/book/validation.rst
@@ -586,6 +586,9 @@ allows you to add a constraint to any public method whose name starts with
 "get", "is" or "has". In this guide, these types of methods are referred to
 as "getters".
 
+.. versionadded:: 2.5
+    Support for methods starting with ``has`` is new in Symfony 2.5.
+
 The benefit of this technique is that it allows you to validate your object
 dynamically. For example, suppose you want to make sure that a password field
 doesn't match the first name of the user (for security reasons). You can