diff --git a/packages/table-core/src/filterFns.ts b/packages/table-core/src/filterFns.ts
index d6aabdb6c4..5667e80e82 100644
--- a/packages/table-core/src/filterFns.ts
+++ b/packages/table-core/src/filterFns.ts
@@ -5,7 +5,7 @@ const includesString: FilterFn<any> = (
   columnId: string,
   filterValue: string
 ) => {
-  const search = filterValue.toLowerCase()
+  const search = filterValue?.toString()?.toLowerCase()
   return Boolean(
     row
       .getValue<string | null>(columnId)