diff --git a/src/layouts/stack.ts b/src/layouts/stack.ts
index c8f8e06a..9f64f70e 100644
--- a/src/layouts/stack.ts
+++ b/src/layouts/stack.ts
@@ -301,7 +301,7 @@ function getCommonStyles(opts: {
   }
 
   return {
-    zIndex,
+    zIndex: Math.round(zIndex),
     opacity,
   };
 }