diff --git a/src/appkit/window/mod.rs b/src/appkit/window/mod.rs
index 1e0e189..c782037 100644
--- a/src/appkit/window/mod.rs
+++ b/src/appkit/window/mod.rs
@@ -214,7 +214,7 @@ impl<T> Window<T> {
 
         unsafe {
             let subtitle = NSString::new(subtitle);
-            let _: () = msg_send![&*self.objc, setTitle: title];
+            let _: () = msg_send![&*self.objc, setSubtitle: subtitle];
         }
     }