diff --git a/src/packages/MarketPlace/main.ts b/src/packages/MarketPlace/main.ts
index 861461d..f94271b 100644
--- a/src/packages/MarketPlace/main.ts
+++ b/src/packages/MarketPlace/main.ts
@@ -66,7 +66,7 @@ namespace OS {
                 };
 
                 this.catlist.ontabselect = (e) => {
-                    const selected = this.catlist.selected;
+                    const selected = this.catlist.selected as number;
                     if(selected < 0)
                         return;