diff --git a/immutablemodel/models.py b/immutablemodel/models.py
index 6ca174f..fbc20e0 100644
--- a/immutablemodel/models.py
+++ b/immutablemodel/models.py
@@ -1,5 +1,6 @@
 # encoding: utf-8
-from django.db import models
+from django.db import models, router
+from django.db.models.deletion import Collector
 from django.utils import six
 
 
@@ -194,7 +195,12 @@ def delete(self):
                 raise CantDeleteImmutableException(
                     "%s is immutable and cannot be deleted" % self
                 )
-        self._deleting_immutable_model = True
+        collector = Collector(using=router.db_for_write(self.__class__, instance=self))
+        collector.collect([self], collect_related=False)
+        collector.sort()
+        for model, instances in collector.data.items():
+            for instance in instances:
+                instance._deleting_immutable_model = True
         super(ImmutableModel, self).delete()
         delattr(self, '_deleting_immutable_model')
 
diff --git a/setup.py b/setup.py
index f69e98e..c98e207 100644
--- a/setup.py
+++ b/setup.py
@@ -8,7 +8,7 @@
 
 setup(
     name = 'django-immutablemodel',
-    version = '0.3.4',
+    version = '0.3.5',
     description="A base class for Django to allow immutable fields on Models",
     long_description=README + '\n\n' + NEWS,
     classifiers=[