diff --git a/CHANGELOG.md b/CHANGELOG.md
index f00b5d15..21d2c5f5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -70,6 +70,14 @@
 ## Unreleased
 ### Added
 ### Changed
+
+* When enabling _"focus mode"_ (private mode 1004), foot now sends a
+  focus event immediately, to inform the application what the current
+  state is ([#2202][2202]).
+
+[2202]: https://codeberg.org/dnkl/foot/issues/2202
+
+
 ### Deprecated
 ### Removed
 ### Fixed
diff --git a/csi.c b/csi.c
index 437fd8bc..c5f616ac 100644
--- a/csi.c
+++ b/csi.c
@@ -422,6 +422,8 @@ decset_decrst(struct terminal *term, unsigned param, bool enable)
 
     case 1004:
         term->focus_events = enable;
+        if (enable)
+            term_to_slave(term, term->kbd_focus ? "\033[I" : "\033[O", 3);
         break;
 
     case 1005: