diff --git a/core/modules/openid/config/schema/openid.schema.yml b/core/modules/openid/config/schema/openid.schema.yml
new file mode 100644
index 0000000000000000000000000000000000000000..2ae57385b73c3b1bdd72caa4a715a22270b8e2c7
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+++ b/core/modules/openid/config/schema/openid.schema.yml
@@ -0,0 +1,9 @@
+# Schema for the configuration files of the openid module.
+
+openid.settings:
+  type: mapping
+  label: 'OpenID settings'
+  mapping:
+    xri_proxy_resolver:
+      type: string
+      label: 'Proxy resolver for XRI'