diff --git a/lib/matplotlib/backends/backend_qt.py b/lib/matplotlib/backends/backend_qt.py
index 68f61a6cc75e..b02edc6c64df 100644
--- a/lib/matplotlib/backends/backend_qt.py
+++ b/lib/matplotlib/backends/backend_qt.py
@@ -794,7 +794,8 @@ def save_figure(self, *args):
             except Exception as e:
                 QtWidgets.QMessageBox.critical(
                     self, "Error saving file", str(e),
-                    QtWidgets.QMessageBox.Ok, QtWidgets.QMessageBox.NoButton)
+                    _enum("QtWidgets.QMessageBox.StandardButton").Ok,
+                    _enum("QtWidgets.QMessageBox.StandardButton").NoButton)
 
     def set_history_buttons(self):
         can_backward = self._nav_stack._pos > 0