diff --git a/plinth/modules/upgrades/upgrades.py b/plinth/modules/upgrades/upgrades.py
index 50f109059..e000320af 100644
--- a/plinth/modules/upgrades/upgrades.py
+++ b/plinth/modules/upgrades/upgrades.py
@@ -70,7 +70,7 @@ def run(request):
                             {'title': _('Package Upgrades'),
                              'subsubmenu': subsubmenu,
                              'upgrades_output': output,
-                             'upgrades__error': error})
+                             'upgrades_error': error})
 
 
 class ConfigureForm(forms.Form):