diff --git a/src/bin/clapper-app/clapper-app-types.c b/src/bin/clapper-app/clapper-app-types.c
new file mode 100644
index 00000000..568970cf
--- /dev/null
+++ b/src/bin/clapper-app/clapper-app-types.c
@@ -0,0 +1,42 @@
+/* Clapper Application
+ * Copyright (C) 2024 Rafał Dzięgiel <rafostar.github@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "clapper-app-types.h"
+
+#include "clapper-app-headerbar.h"
+#include "clapper-app-media-item-box.h"
+#include "clapper-app-property-row.h"
+#include "clapper-app-queue-list.h"
+#include "clapper-app-queue-progression-model.h"
+#include "clapper-app-window-state-buttons.h"
+
+/*
+ * clapper_app_types_init:
+ *
+ * Ensure private types that appear in UI files in order for
+ * GtkBuilder to be able to find them when building templates.
+ */
+inline void
+clapper_app_types_init (void)
+{
+  g_type_ensure (CLAPPER_APP_TYPE_HEADERBAR);
+  g_type_ensure (CLAPPER_APP_TYPE_MEDIA_ITEM_BOX);
+  g_type_ensure (CLAPPER_APP_TYPE_PROPERTY_ROW);
+  g_type_ensure (CLAPPER_APP_TYPE_QUEUE_LIST);
+  g_type_ensure (CLAPPER_APP_TYPE_QUEUE_PROGRESSION_MODEL);
+  g_type_ensure (CLAPPER_APP_TYPE_WINDOW_STATE_BUTTONS);
+}
diff --git a/src/bin/clapper-app/clapper-app-types.h b/src/bin/clapper-app/clapper-app-types.h
new file mode 100644
index 00000000..d4f79f8a
--- /dev/null
+++ b/src/bin/clapper-app/clapper-app-types.h
@@ -0,0 +1,27 @@
+/* Clapper Application
+ * Copyright (C) 2024 Rafał Dzięgiel <rafostar.github@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <glib.h>
+
+G_BEGIN_DECLS
+
+G_GNUC_INTERNAL
+void clapper_app_types_init (void);
+
+G_END_DECLS
diff --git a/src/bin/clapper-app/main.c b/src/bin/clapper-app/main.c
index cd33040e..da3d87fa 100644
--- a/src/bin/clapper-app/main.c
+++ b/src/bin/clapper-app/main.c
@@ -25,6 +25,7 @@
 #include <clapper/clapper.h>
 
 #include "clapper-app-application.h"
+#include "clapper-app-types.h"
 
 gint
 main (gint argc, gchar **argv)
@@ -46,6 +47,8 @@ main (gint argc, gchar **argv)
   gtk_init ();
   adw_init ();
 
+  clapper_app_types_init ();
+
   g_set_application_name ("Clapper");
 
   application = clapper_app_application_new ();
diff --git a/src/bin/clapper-app/meson.build b/src/bin/clapper-app/meson.build
index 70e9d168..76e298a6 100644
--- a/src/bin/clapper-app/meson.build
+++ b/src/bin/clapper-app/meson.build
@@ -67,6 +67,7 @@ clapperapp_sources = [
   'clapper-app-queue-progression-item.c',
   'clapper-app-queue-progression-model.c',
   'clapper-app-queue-selection.c',
+  'clapper-app-types.c',
   'clapper-app-uri-dialog.c',
   'clapper-app-utils.c',
   'clapper-app-window.c',