diff --git a/docs/reference/gtk/migrating-3to4.xml b/docs/reference/gtk/migrating-3to4.xml
index 634fcbe71d..570bdca0d7 100644
--- a/docs/reference/gtk/migrating-3to4.xml
+++ b/docs/reference/gtk/migrating-3to4.xml
@@ -470,6 +470,22 @@
+
+ Focus handling changes
+
+ The semantics of the #GtkWidget:can-focus property have changed.
+ In GTK 3, this property only meant that the widget itself would not
+ accept keyboard input, but its children still might (in the case of
+ containers). In GTK 4, if :can-focus is %FALSE, the focus cannot enter
+ the widget or any of its descendents, and the default value has changed
+ from %FALSE to %TRUE.
+
+
+ The recommended way to influence focus behavior of custom widgets
+ in GTK 4 is to override the focus() and grab_focus() vfuncs.
+
+
+