diff --git a/frontend/src/app/render_wasm/api.cljs b/frontend/src/app/render_wasm/api.cljs
index bb60f88fd9..ac51772dd9 100644
--- a/frontend/src/app/render_wasm/api.cljs
+++ b/frontend/src/app/render_wasm/api.cljs
@@ -489,7 +489,7 @@
 (defn set-grid-layout-cells
   [cells]
   (let [entries (vals cells)
-        size    (mem/get-alloc-size entries GRID-LAYOUT-CELL-U8-SIZE)
+        size    (mem/get-alloc-size cells GRID-LAYOUT-CELL-U8-SIZE)
         offset  (mem/alloc size)
         heap    (-> (mem/get-heap-u8)
                     (mem/view offset size))]
diff --git a/render-wasm/src/shapes/layouts.rs b/render-wasm/src/shapes/layouts.rs
index 1019ee79d1..edb2e80548 100644
--- a/render-wasm/src/shapes/layouts.rs
+++ b/render-wasm/src/shapes/layouts.rs
@@ -385,6 +385,7 @@ impl GridData {
     }
 }
 
+// FIXME: use transmute
 #[derive(Debug)]
 #[repr(C)]
 pub struct RawGridTrack {