diff --git a/src/mode/fdm/export.js b/src/mode/fdm/export.js
index 66688c48..4f6158ad 100644
--- a/src/mode/fdm/export.js
+++ b/src/mode/fdm/export.js
@@ -281,6 +281,7 @@
             }
             let epos = isBelt ? { x: pos.x, y: pos.y, z: pos.z } : pos;
             if (isBelt) {
+                let zheight = path ? path.height || 0 : 0;
                 epos.x = originCenter ? -pos.x : device.bedWidth - pos.x;
                 epos.z = blastz = pos.z * icos;
                 epos.y = -pos.y + epos.z * bcos;
diff --git a/web/kiri/index.css b/web/kiri/index.css
index 42c77625..90db0324 100644
--- a/web/kiri/index.css
+++ b/web/kiri/index.css
@@ -489,7 +489,7 @@ th, tr, td, label {
     text-align: center;
 }
 .lt-menu label {
-    font-size: smaller;
+    font-size: small;
 }
 .lt-enabled, .lt-active {
     color: var(--fg-gray);