diff --git a/doc/releases/migration-guide-4.2.rst b/doc/releases/migration-guide-4.2.rst
index d3af0ccc646..e643142e0ba 100644
--- a/doc/releases/migration-guide-4.2.rst
+++ b/doc/releases/migration-guide-4.2.rst
@@ -617,6 +617,13 @@ Audio
 Other subsystems
 ****************
 
+hawkBit
+=======
+
+* When :kconfig:option:`CONFIG_HAWKBIT_CUSTOM_DEVICE_ID` is enabled, device_id will no longer
+  be prepended with :kconfig:option:`CONFIG_BOARD`. It is the user's responsibility to write a
+  callback that prepends the board name if needed.
+
 Modules
 *******