diff --git a/src/platform/lumin-runtime/elements/builders/loading-spinner-builder.js b/src/platform/lumin-runtime/elements/builders/loading-spinner-builder.js
index 51d7c82..5fedd08 100644
--- a/src/platform/lumin-runtime/elements/builders/loading-spinner-builder.js
+++ b/src/platform/lumin-runtime/elements/builders/loading-spinner-builder.js
@@ -50,6 +50,7 @@ export class LoadingSpinnerBuilder extends UiNodeBuilder {
         PropertyDescriptor.throwIfNotTypeOf(newProperties.resourceId, 'number');
         PropertyDescriptor.throwIfNotTypeOf(newProperties.resourcePath, 'string');
         PropertyDescriptor.throwIfNotTypeOf(newProperties.height, 'number');
+        PropertyDescriptor.throwIfNotTypeOf(newProperties.determinate, 'boolean');
     }
 }