diff --git a/src/render.rs b/src/render.rs
index 19331b8..50ed309 100644
--- a/src/render.rs
+++ b/src/render.rs
@@ -167,7 +167,7 @@ pub fn render_frame(
     let map_area = root.margin(TITLE_H, MARGIN, MARGIN, LEGEND_W + MARGIN);
 
     let map_w = IMG_WIDTH - LEGEND_W - MARGIN * 2;
-    let map_h = IMG_HEIGHT - TITLE_H - MARGIN * 2;
+    let map_h = IMG_HEIGHT - TITLE_H - MARGIN;
 
     map_area.fill(&LAND_BG).context("fill map area")?;