diff --git a/CHANGES/1042.bugfix b/CHANGES/1042.bugfix
new file mode 100644
index 00000000..af33b582
--- /dev/null
+++ b/CHANGES/1042.bugfix
@@ -0,0 +1 @@
+Fixed edge-case migration error in 0017_pythonpackagecontent_size.
diff --git a/pulp_python/app/migrations/0017_pythonpackagecontent_size.py b/pulp_python/app/migrations/0017_pythonpackagecontent_size.py
index a30497a1..dddbe1ba 100644
--- a/pulp_python/app/migrations/0017_pythonpackagecontent_size.py
+++ b/pulp_python/app/migrations/0017_pythonpackagecontent_size.py
@@ -14,7 +14,7 @@ def add_size_to_current_models(apps, schema_editor):
             artifact = content_artifact.artifact
         else:
             artifact = RemoteArtifact.objects.filter(content_artifact=content_artifact).first()
-        python_package.size = artifact.size or 0
+        python_package.size = artifact and artifact.size or 0
         package_bulk.append(python_package)
         if len(package_bulk) == 100000:
             with transaction.atomic():