diff --git a/pykeg/contrib/twitter/forms.py b/pykeg/contrib/twitter/forms.py
index af2c8795f..719f1781c 100644
--- a/pykeg/contrib/twitter/forms.py
+++ b/pykeg/contrib/twitter/forms.py
@@ -33,6 +33,8 @@ class SiteSettingsForm(forms.Form):
                                           help_text='Tweet when a keg is started or ended.')
     tweet_session_events = forms.BooleanField(initial=True, required=False,
                                               help_text='Tweet when a new session is started.')
+    tweet_session_joined_events = forms.BooleanField(initial=False, required=False,
+                                                     help_text='Tweet someone joins a session.')
     tweet_drink_events = forms.BooleanField(
         initial=False,
         required=False,
diff --git a/pykeg/contrib/twitter/plugin.py b/pykeg/contrib/twitter/plugin.py
index 8ada0c8c0..1400f8074 100644
--- a/pykeg/contrib/twitter/plugin.py
+++ b/pykeg/contrib/twitter/plugin.py
@@ -196,7 +196,7 @@ def _issue_system_tweet(self, event, settings, site_profile):
             template = settings.get('session_started_template')
 
         elif kind == event.SESSION_JOINED:
-            if not settings.get('tweet_session_events'):
+            if not settings.get('tweet_session_joined_events'):
                 self.logger.info(
                     'Skipping system tweet for session join event %s: disabled by settings.' %
                     event.id)
diff --git a/pykeg/contrib/twitter/plugin_test.py b/pykeg/contrib/twitter/plugin_test.py
index a5c2e8b26..2e1ce6e98 100644
--- a/pykeg/contrib/twitter/plugin_test.py
+++ b/pykeg/contrib/twitter/plugin_test.py
@@ -53,6 +53,7 @@ def test_get_site_twitter_settings_form(self):
         expected = {
             'tweet_keg_events': True,
             'tweet_session_events': True,
+            'tweet_session_joined_events': False,
             'tweet_drink_events': False,
             'include_guests': True,
             'include_pictures': False,