diff -r 59d97ac069f0 -r a29b53f97d1a ui/gtk/Makefile
--- a/ui/gtk/Makefile	Tue Sep 08 16:08:59 2026 +0200
+++ b/ui/gtk/Makefile	Wed Sep 09 18:57:52 2026 +0200
@@ -105,7 +105,8 @@
  gtk/../common/toolbar.h gtk/../common/../ui/toolbar.h \
  gtk/../common/menu.h gtk/../common/../ui/menu.h \
  gtk/../common/../ui/toolkit.h gtk/button.h gtk/../ui/button.h gtk/menu.h \
- gtk/../ui/menu.h gtk/../common/menu.h gtk/../ui/properties.h
+ gtk/../ui/menu.h gtk/../common/menu.h gtk/../ui/widget.h \
+ gtk/../ui/properties.h
 	$(CC) -o $@ $(CFLAGS) -I../ucx $(SHLIB_CFLAGS) $(TK_CFLAGS) -c $<
 
 $(GTK_OBJPRE)icon.o: gtk/icon.c gtk/toolkit.h gtk/../ui/toolkit.h \
@@ -120,7 +121,8 @@
  gtk/../common/context.h gtk/../common/../ui/toolkit.h \
  gtk/../common/action.h gtk/../common/object.h gtk/container.h \
  gtk/../ui/container.h gtk/menu.h gtk/../ui/menu.h gtk/../common/menu.h \
- gtk/../common/../ui/menu.h gtk/widget.h gtk/../ui/widget.h
+ gtk/../common/../ui/menu.h gtk/widget.h gtk/../ui/widget.h \
+ gtk/../common/action.h
 	$(CC) -o $@ $(CFLAGS) -I../ucx $(SHLIB_CFLAGS) $(TK_CFLAGS) -c $<
 
 $(GTK_OBJPRE)list.o: gtk/list.c gtk/../common/context.h \
@@ -180,6 +182,13 @@
  gtk/../common/menu.h gtk/../common/threadpool.h gtk/../common/app.h
 	$(CC) -o $@ $(CFLAGS) -I../ucx $(SHLIB_CFLAGS) $(TK_CFLAGS) -c $<
 
+$(GTK_OBJPRE)tree.o: gtk/tree.c gtk/tree.h gtk/../ui/tree.h \
+ gtk/../ui/list.h gtk/../ui/toolkit.h gtk/toolkit.h gtk/../ui/toolkit.h \
+ gtk/../common/context.h gtk/../common/../ui/toolkit.h \
+ gtk/../common/action.h gtk/../common/object.h gtk/../common/container.h \
+ gtk/../common/../ui/container.h gtk/../common/../ui/toolkit.h
+	$(CC) -o $@ $(CFLAGS) -I../ucx $(SHLIB_CFLAGS) $(TK_CFLAGS) -c $<
+
 $(GTK_OBJPRE)webview.o: gtk/webview.c gtk/toolkit.h gtk/../ui/toolkit.h \
  gtk/../common/context.h gtk/../common/../ui/toolkit.h \
  gtk/../common/action.h gtk/../common/object.h gtk/container.h \
@@ -204,6 +213,6 @@
  gtk/../ui/toolkit.h gtk/../common/object.h gtk/toolbar.h \
  gtk/../ui/toolbar.h gtk/list.h gtk/../ui/list.h gtk/container.h \
  gtk/../ui/container.h gtk/headerbar.h gtk/button.h gtk/../ui/button.h \
- gtk/window.h
+ gtk/window.h gtk/widget.h gtk/../ui/widget.h
 	$(CC) -o $@ $(CFLAGS) -I../ucx $(SHLIB_CFLAGS) $(TK_CFLAGS) -c $<