diff --git a/locker/src/main.rs b/locker/src/main.rs
index 2378581..237ae1a 100644
--- a/locker/src/main.rs
+++ b/locker/src/main.rs
@@ -673,7 +673,12 @@ fn start_unlock_dialog<'a>(conn: &'a xcb::Connection, state: &State<'a>, trigger
             window: monitor.root,
         });
         let reply = conn.wait_for_reply(cookie)?;
-        if reply.same_screen() {
+        let px = reply.root_x() as i32;
+        let py = reply.root_y() as i32;
+        if reply.same_screen()
+            && px >= monitor.x as i32 && px < monitor.x as i32 + monitor.width as i32
+            && py >= monitor.y as i32 && py < monitor.y as i32 + monitor.height as i32
+        {
             pointer_monitor = Some(monitor);
             break;
         }