diff --git a/roles/matrix-ldap-registration-proxy/tasks/validate_config.yml b/roles/matrix-ldap-registration-proxy/tasks/validate_config.yml
index e69de29b..6b52af9c 100644
--- a/roles/matrix-ldap-registration-proxy/tasks/validate_config.yml
+++ b/roles/matrix-ldap-registration-proxy/tasks/validate_config.yml
@@ -0,0 +1,12 @@
+---
+
+- name: Fail if required settings not defined
+  ansible.builtin.fail:
+    msg: >-
+      You need to define a required configuration setting (`{{ item }}`).
+  when: "vars[item] == ''"
+  with_items:
+    - "matrix_ldap_registration_proxy_ldap_uri"
+    - "matrix_ldap_registration_proxy_ldap_base_dn"
+    - "matrix_ldap_registration_proxy_ldap_user"
+    - "matrix_ldap_registration_proxy_ldap_password"