diff --git a/src/bin/topola-egui/bottom.rs b/src/bin/topola-egui/bottom.rs
index fa865bd..f295d12 100644
--- a/src/bin/topola-egui/bottom.rs
+++ b/src/bin/topola-egui/bottom.rs
@@ -13,7 +13,7 @@ impl Bottom {
             let latest_pos = transform
                 .inverse()
                 .transform_pos(ctx.input(|i| i.pointer.latest_pos().unwrap_or_default()));
-            ui.label(format!("x: {} y: {}", latest_pos.x, latest_pos.y));
+            ui.label(format!("x: {} y: {}", latest_pos.x, -latest_pos.y));
         });
     }
 }