diff --git a/doc/releases/migration-guide-4.2.rst b/doc/releases/migration-guide-4.2.rst
index e88d3ddd610..9b844dbb118 100644
--- a/doc/releases/migration-guide-4.2.rst
+++ b/doc/releases/migration-guide-4.2.rst
@@ -203,6 +203,9 @@ Ethernet
   together with :c:func:`net_eth_get_phy` should be used instead to configure the link
   (:github:`90652`).
 
+* :c:func:`phy_configure_link` got a ``flags`` parameter. Set it to ``0`` to preserve the old
+  behavior (:github:`91354`).
+
 Enhanced Serial Peripheral Interface (eSPI)
 ===========================================