diff --git a/UPGRADE-3.2.md b/UPGRADE-3.2.md
index b65bdd43fc..ef87c75a56 100644
--- a/UPGRADE-3.2.md
+++ b/UPGRADE-3.2.md
@@ -7,6 +7,12 @@ FrameworkBundle
  * The `Controller::getUser()` method has been deprecated and will be removed in
    Symfony 4.0; typehint the security user object in the action instead.
 
+Console
+-------
+
+ * Setting unknown style options is deprecated and will throw an exception in
+   Symfony 4.0.
+
 DependencyInjection
 -------------------
 
diff --git a/UPGRADE-4.0.md b/UPGRADE-4.0.md
index 42f709fe7c..e3f82ab74b 100644
--- a/UPGRADE-4.0.md
+++ b/UPGRADE-4.0.md
@@ -1,6 +1,12 @@
 UPGRADE FROM 3.x to 4.0
 =======================
 
+Console
+-------
+
+ * Setting unknown style options is not supported anymore and throws an
+   exception.
+
 Debug
 -----