diff --git a/src/main.rs b/src/main.rs
index a5e80a4..730c341 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -15,6 +15,7 @@
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 use adw::prelude::*;
+use adw::subclass::prelude::ObjectSubclassIsExt;
 use gtk::{gio, glib};
 
 mod message;