diff --git a/src/aare/gui/panels/rotation_data_collection.py b/src/aare/gui/panels/rotation_data_collection.py
index f4e21b63..3899087a 100644
--- a/src/aare/gui/panels/rotation_data_collection.py
+++ b/src/aare/gui/panels/rotation_data_collection.py
@@ -217,7 +217,7 @@ class RotationDataCollectionPanel(ScanSettingsPanel):
             f"(max {MAX_OMEGA_SPEED_DEG_S:.0f} °/s, min image time {self._min_exp_time_s:.4f} s)"
         )
         logger.error(msg)
-        QMessageBox.critical(None, "Error", msg)
+        QMessageBox.critical(self, "Error", msg)
         return True
 
     @Slot()