diff --git a/builtin-os-file-iter.go b/builtin-os-file-iter.go
index d2db1ed..759cbe4 100644
--- a/builtin-os-file-iter.go
+++ b/builtin-os-file-iter.go
@@ -45,9 +45,9 @@ func (it *fileIterBase) increment() {
 
 func (it *fileIterBase) repr(typeName string) string {
 	if it.reader.Valid() {
-		return fmt.Sprintf("$(%s@%q)", fileLineIteratorType, it.reader.GetName())
+		return fmt.Sprintf("$(%s@%q)", typeName, it.reader.GetName())
 	}
-	return fmt.Sprintf("$(%s@<nil>)", fileLineIteratorType)
+	return fmt.Sprintf("$(%s@<nil>)", typeName)
 }
 
 func initFileHandle(ctx kern.ExprContext, name string, args map[string]any) (handle *file.Reader, invalidFileHandle any, autoClose bool, err error) {