diff --git a/.gitignore b/.gitignore
index e63dffc7..7d2422d1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -15,3 +15,4 @@ build/
 dist/
 docs/_build/
 htmlcov/
+venv/
diff --git a/polymorphic/tests.py b/polymorphic/tests.py
index 9c2cb3d4..083a93c9 100644
--- a/polymorphic/tests.py
+++ b/polymorphic/tests.py
@@ -428,6 +428,14 @@ class DateModel(PolymorphicModel):
     date = models.DateTimeField()
 
 
+class PrefetchRelatedA(PolymorphicModel):
+    pass
+
+
+class PrefetchRelatedB(models.Model):
+    links = models.ManyToManyField(PrefetchRelatedA)
+
+
 class PolymorphicTests(TestCase):
     """
     The test suite
@@ -1325,6 +1333,17 @@ def func():
         # Ensure no queries are made using the default database.
         self.assertNumQueries(0, func)
 
+    def test_prefetch_related_behaves_normally_with_polymorphic_model(self):
+        """See #68"""
+        b1 = PrefetchRelatedB.objects.create()
+        b2 = PrefetchRelatedB.objects.create()
+        a = b1.links.create()
+        b2.links.add(a)
+
+        qs = PrefetchRelatedB.objects.prefetch_related('links')
+        for obj in qs:
+            self.assertEqual(len(obj.links.all()), 1)
+
 
 def qrepr(data):
     """