Index: spyder/app/mainwindow.py
--- spyder/app/mainwindow.py.orig
+++ spyder/app/mainwindow.py
@@ -1037,7 +1037,7 @@ class MainWindow(QMainWindow):
         add_actions(web_resources, webres_actions)
         self.help_menu_actions.append(web_resources)
         # Qt assistant link
-        if sys.platform.startswith('linux') and not PYQT5:
+        if sys.platform.startswith(('linux','openbsd')) and not PYQT5:
             qta_exe = "assistant-qt4"
         else:
             qta_exe = "assistant"
