diff --git a/cms/djangoapps/contentstore/migrations/0011_enable_markdown_editor_flag_by_default.py b/cms/djangoapps/contentstore/migrations/0011_enable_markdown_editor_flag_by_default.py
new file mode 100644
index 000000000000..491ae0e4224a
--- /dev/null
+++ b/cms/djangoapps/contentstore/migrations/0011_enable_markdown_editor_flag_by_default.py
@@ -0,0 +1,25 @@
+from django.db import migrations
+
+from cms.djangoapps.contentstore.toggles import (
+    ENABLE_REACT_MARKDOWN_EDITOR
+)
+
+
+def create_flag(apps, schema_editor):
+    Flag = apps.get_model('waffle', 'Flag')
+    Flag.objects.get_or_create(
+        name=ENABLE_REACT_MARKDOWN_EDITOR.name, defaults={'everyone': True}
+    )
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ('contentstore', '0010_container_link_models'),
+        ('waffle', '0001_initial'),
+    ]
+
+    operations = [
+        # Do not remove the flags for rollback.  We don't want to lose originals if
+        # they already existed, and it won't hurt if they are created.
+        migrations.RunPython(create_flag, reverse_code=migrations.RunPython.noop),
+    ]