diff --git a/src/lay/lay/doc/programming/qt_binding.xml b/src/lay/lay/doc/programming/qt_binding.xml
index 9ba46caef..ccb07a4e5 100644
--- a/src/lay/lay/doc/programming/qt_binding.xml
+++ b/src/lay/lay/doc/programming/qt_binding.xml
@@ -243,7 +243,7 @@ end</pre>
   include RBA
 
   ui_file = QFile::new(QFileInfo::new($0).dir.filePath("MyDialog.ui"))
-  ui_file.open(QIODevice::ReadOnly.to_i)
+  ui_file.open(QIODevice::ReadOnly)
   dialog = QFormBuilder::new.load(ui_file, Application::instance.main_window)
   ui_file.close