diff --git a/src/gui/event-editor/gcal-event-editor-section.c b/src/gui/event-editor/gcal-event-editor-section.c
index 58bda687..4fc11956 100644
--- a/src/gui/event-editor/gcal-event-editor-section.c
+++ b/src/gui/event-editor/gcal-event-editor-section.c
@@ -20,7 +20,7 @@
 
 #include "gcal-event-editor-section.h"
 
-G_DEFINE_INTERFACE (GcalEventEditorSection, gcal_event_editor_section, GTK_TYPE_WIDGET)
+G_DEFINE_INTERFACE (GcalEventEditorSection, gcal_event_editor_section, ADW_TYPE_PREFERENCES_GROUP)
 
 static void
 gcal_event_editor_section_default_init (GcalEventEditorSectionInterface *iface)
diff --git a/src/gui/event-editor/gcal-event-editor-section.h b/src/gui/event-editor/gcal-event-editor-section.h
index 85e2a386..bc417060 100644
--- a/src/gui/event-editor/gcal-event-editor-section.h
+++ b/src/gui/event-editor/gcal-event-editor-section.h
@@ -22,13 +22,13 @@
 
 #include "gcal-event.h"
 
-#include <gtk/gtk.h>
+#include <adwaita.h>
 
 G_BEGIN_DECLS
 
 #define GCAL_TYPE_EVENT_EDITOR_SECTION (gcal_event_editor_section_get_type ())
 
-G_DECLARE_INTERFACE (GcalEventEditorSection, gcal_event_editor_section, GCAL, EVENT_EDITOR_SECTION, GtkBox)
+G_DECLARE_INTERFACE (GcalEventEditorSection, gcal_event_editor_section, GCAL, EVENT_EDITOR_SECTION, AdwPreferencesGroup)
 
 typedef enum
 {