diff --git a/core/modules/field/config/field.schema.yml b/core/modules/field/config/field.schema.yml
new file mode 100644
index 0000000..0a11bfb
--- /dev/null
+++ b/core/modules/field/config/field.schema.yml
@@ -0,0 +1,7 @@
+# Module settings
+field.settings:
+  type: mapping
+  label: 'Field settings'
+  mapping:
+    'purge_batch_size':
+      type: integer