diff --git a/Assets/Treasure/Example/Scripts/HarvesterUI.cs b/Assets/Treasure/Example/Scripts/HarvesterUI.cs
index 6ab16c39..a8642d27 100644
--- a/Assets/Treasure/Example/Scripts/HarvesterUI.cs
+++ b/Assets/Treasure/Example/Scripts/HarvesterUI.cs
@@ -3,6 +3,8 @@
 
 #if TDK_THIRDWEB
 using Thirdweb;
+#else
+using System.Threading.Tasks;
 #endif
 
 using TMPro;