diff --git a/novelwriter/gui/mainmenu.py b/novelwriter/gui/mainmenu.py
index 59e1175f..8090492b 100644
--- a/novelwriter/gui/mainmenu.py
+++ b/novelwriter/gui/mainmenu.py
@@ -993,6 +993,7 @@ class GuiMainMenu(QMenuBar):
         self.aPreferences.triggered.connect(self.mainGui.showPreferencesDialog)
         self.mainGui.addAction(self.aPreferences)
 
+    @pyqtSlot()
     def updateSpellCheckLanguages(self) -> None:
         """Update the list of available spell check languages."""
         self.mSelectLanguage.clear()