diff --git a/app/src/frontend/building/header-buttons/copy-control.tsx b/app/src/frontend/building/header-buttons/copy-control.tsx
index 63dcb4bd..e8f68f51 100644
--- a/app/src/frontend/building/header-buttons/copy-control.tsx
+++ b/app/src/frontend/building/header-buttons/copy-control.tsx
@@ -10,6 +10,7 @@ interface CopyControlProps {
 
 function initCopyControlProps(options?: Partial<CopyControlProps>): CopyControlProps {
     const defaults = {
+        cat: '',
         copying: true
     };