diff --git a/packages/frontend-core/src/components/grid/stores/rows.ts b/packages/frontend-core/src/components/grid/stores/rows.ts
index 61acff5612..263a3c1469 100644
--- a/packages/frontend-core/src/components/grid/stores/rows.ts
+++ b/packages/frontend-core/src/components/grid/stores/rows.ts
@@ -21,13 +21,13 @@ interface IndexedUIRow extends UIRow {
 interface RowStore {
   rows: Writable<UIRow[]>
   fetch: Writable<any>
-  loaded: Writable<any>
+  loaded: Writable<boolean>
   refreshing: Writable<boolean>
   loading: Writable<boolean>
   rowChangeCache: Writable<any>
   inProgressChanges: Writable<any>
   hasNextPage: Writable<boolean>
-  error: Writable<any>
+  error: Writable<string | null>
 }
 
 interface RowDerivedStore {