diff --git a/openslides/agenda/views.py b/openslides/agenda/views.py
index c0db84ec9..5133755d0 100644
--- a/openslides/agenda/views.py
+++ b/openslides/agenda/views.py
@@ -575,14 +575,20 @@ class CurrentListOfSpeakersView(RedirectView):
         """
         Returns the current Item, or None, if the current Slide is not an Agenda Item.
         """
-        active_slide = get_active_slide()
-        if active_slide['callback'] == 'agenda':
-            try:
-                return Item.objects.get(pk=active_slide.get('pk', None))
-            except Item.DoesNotExist:
-                return None
+        slide = get_active_object()
+        if slide is None or isinstance(slide, Item):
+            # No Slide or an agenda item is active
+            item = slide
         else:
-            return None
+            # A related Item is active
+            try:
+                item = Item.objects.filter(
+                    content_type=ContentType.objects.get_for_model(slide),
+                    object_id=slide.pk)[0]
+            except IndexError:
+                item = None
+
+        return item
 
     def get_redirect_url(self):
         """
diff --git a/tests/agenda/test_list_of_speakers.py b/tests/agenda/test_list_of_speakers.py
index 84a3bc47f..b9dac9960 100644
--- a/tests/agenda/test_list_of_speakers.py
+++ b/tests/agenda/test_list_of_speakers.py
@@ -8,10 +8,12 @@ from openslides.agenda.models import Item, Speaker
 from openslides.agenda.signals import agenda_list_of_speakers
 from openslides.config.api import config
 from openslides.participant.models import Group, User
-from openslides.projector.api import set_active_slide
+from openslides.projector.api import set_active_slide, register_slide_model
 from openslides.utils.exceptions import OpenSlidesError
 from openslides.utils.test import TestCase
 
+from .models import RelatedItem
+
 
 class ListOfSpeakerModelTests(TestCase):
     def setUp(self):
@@ -264,6 +266,20 @@ class GlobalListOfSpeakersLinks(SpeakerViewTestCase):
         response = self.speaker2_client.get('/agenda/list_of_speakers/add/')
         self.assertMessage(response, 'You were successfully added to the list of speakers.')
 
+    def test_next_speaker_on_related_item(self):
+        """
+        Test to add a speaker on a related item.
+        """
+        register_slide_model(RelatedItem, 'some/template.html')
+        related_item = RelatedItem.objects.create()
+        agenda_item = Item.objects.create(content_object=related_item)
+        config['projector_active_slide'] = {'callback': 'test_related_item', 'pk': 1}
+        response = self.speaker1_client.get('/agenda/list_of_speakers/add/')
+
+        self.assertRedirects(response, '/agenda/%d/' % agenda_item.pk)
+        self.assertEqual(Speaker.objects.get(item__pk=agenda_item.pk).person, self.speaker1)
+        self.assertMessage(response, 'You were successfully added to the list of speakers.')
+
     def test_global_next_speaker_url(self):
         response = self.admin_client.get('/agenda/list_of_speakers/next/')
         self.assertRedirects(response, '/dashboard/')