diff --git a/src/components/CesiumMap/skyBoxOnGround.js b/src/components/CesiumMap/skyBoxOnGround.js
index ea4aa89..e20ae80 100644
--- a/src/components/CesiumMap/skyBoxOnGround.js
+++ b/src/components/CesiumMap/skyBoxOnGround.js
@@ -86,7 +86,7 @@ export default class SkyBoxOnGround {
      * @type {Boolean}
      * @default true
      */
-    this.show = defaultValue(options.show, true);
+    this.show = options.show ?? true;
 
     this._command = new DrawCommand({
       modelMatrix: Matrix4.clone(Matrix4.IDENTITY),