diff --git a/src/pretix/api/views/media.py b/src/pretix/api/views/media.py
index fac6c018c0..7b1509128d 100644
--- a/src/pretix/api/views/media.py
+++ b/src/pretix/api/views/media.py
@@ -119,14 +119,38 @@ class ReusableMediaViewSet(viewsets.ModelViewSet):
 
     @transaction.atomic()
     def perform_update(self, serializer):
-        ReusableMedium.objects.select_for_update(of=OF_SELF).get(pk=self.get_object().pk)
+        rm = ReusableMedium.objects.select_for_update(of=OF_SELF).get(pk=self.get_object().pk)
+        prev_linked_ops_pks = list(rm.linked_orderpositions.values_list("pk", flat=True))
         inst = serializer.save(identifier=serializer.instance.identifier, type=serializer.instance.type)
-        inst.log_action(
-            'pretix.reusable_medium.changed',
-            user=self.request.user,
-            auth=self.request.auth,
-            data=self.request.data,
-        )
+        linked_ops_pks = inst.linked_orderpositions.values_list("pk", flat=True)
+        for op_pk in prev_linked_ops_pks:
+            if op_pk not in linked_ops_pks:
+                inst.log_action(
+                    'pretix.reusable_medium.linked_orderposition.removed',
+                    user=self.request.user,
+                    auth=self.request.auth,
+                    data={
+                        'linked_orderposition': op_pk,
+                    }
+                )
+        for op_pk in linked_ops_pks:
+            if op_pk not in prev_linked_ops_pks:
+                inst.log_action(
+                    'pretix.reusable_medium.linked_orderposition.added',
+                    user=self.request.user,
+                    auth=self.request.auth,
+                    data={
+                        'linked_orderposition': op_pk,
+                    }
+                )
+        data = {k: v for k, v in self.request.data.items() if k not in ('linked_orderposition', 'linked_orderpositions')}
+        if data:
+            inst.log_action(
+                'pretix.reusable_medium.changed',
+                user=self.request.user,
+                auth=self.request.auth,
+                data=data,
+            )
         return inst
 
     def perform_destroy(self, instance):
diff --git a/src/tests/api/test_reusable_media.py b/src/tests/api/test_reusable_media.py
index 11e8fb3533..1f91a9f685 100644
--- a/src/tests/api/test_reusable_media.py
+++ b/src/tests/api/test_reusable_media.py
@@ -529,6 +529,7 @@ def test_medium_patch(token_client, organizer, event, medium, giftcard, customer
     medium.refresh_from_db()
     with scopes_disabled():
         assert list(medium.linked_orderpositions.values_list('pk', flat=True)) == [op.pk]
+        assert medium.all_logentries().count() == 2
 
     resp = token_client.patch(
         '/api/v1/organizers/{}/reusablemedia/{}/'.format(organizer.slug, medium.pk),
@@ -541,6 +542,20 @@ def test_medium_patch(token_client, organizer, event, medium, giftcard, customer
     medium.refresh_from_db()
     with scopes_disabled():
         assert list(medium.linked_orderpositions.values_list('pk', flat=True)) == [op.pk, op2.pk]
+        assert medium.all_logentries().count() == 3
+
+    resp = token_client.patch(
+        '/api/v1/organizers/{}/reusablemedia/{}/'.format(organizer.slug, medium.pk),
+        {
+            'linked_orderpositions': [op2.pk],
+        },
+        format='json'
+    )
+    assert resp.status_code == 200
+    medium.refresh_from_db()
+    with scopes_disabled():
+        assert list(medium.linked_orderpositions.values_list('pk', flat=True)) == [op2.pk]
+        assert medium.all_logentries().count() == 4
 
     resp = token_client.patch(
         '/api/v1/organizers/{}/reusablemedia/{}/'.format(organizer.slug, medium.pk),