diff --git a/roles/custom/matrix-client-element/defaults/main.yml b/roles/custom/matrix-client-element/defaults/main.yml
index f64f302d..3b1899cf 100644
--- a/roles/custom/matrix-client-element/defaults/main.yml
+++ b/roles/custom/matrix-client-element/defaults/main.yml
@@ -149,7 +149,7 @@ matrix_client_element_integrations_ui_url: "https://scalar.vector.im/"
 matrix_client_element_integrations_rest_url: "https://scalar.vector.im/api"
 matrix_client_element_integrations_widgets_urls: ["https://scalar.vector.im/api"]
 matrix_client_element_integrations_jitsi_widget_url: "https://scalar.vector.im/api/widgets/jitsi.html"
-matrix_client_element_permalinkPrefix: "https://matrix.to"  # noqa var-naming
+matrix_client_element_permalink_prefix: "https://matrix.to"  # noqa var-naming
 matrix_client_element_bug_report_endpoint_url: "https://element.io/bugreports/submit"
 matrix_client_element_show_lab_settings: true  # noqa var-naming
 # Element public room directory server(s)
diff --git a/roles/custom/matrix-client-element/tasks/validate_config.yml b/roles/custom/matrix-client-element/tasks/validate_config.yml
index 50455cae..425683b8 100644
--- a/roles/custom/matrix-client-element/tasks/validate_config.yml
+++ b/roles/custom/matrix-client-element/tasks/validate_config.yml
@@ -35,6 +35,7 @@
   when: "item.old in vars"
   with_items:
     - {'old': 'matrix_client_element_showLabsSettings', 'new': 'matrix_client_element_show_lab_settings'}
+    - {'old': 'matrix_client_element_permalinkPrefix', 'new': 'matrix_client_element_permalink_prefix'}
 
 - when: matrix_client_element_container_labels_traefik_enabled | bool
   block:
diff --git a/roles/custom/matrix-client-element/templates/config.json.j2 b/roles/custom/matrix-client-element/templates/config.json.j2
index 5d510403..798faa1d 100644
--- a/roles/custom/matrix-client-element/templates/config.json.j2
+++ b/roles/custom/matrix-client-element/templates/config.json.j2
@@ -13,7 +13,7 @@
 	},
 	"default_theme": {{ matrix_client_element_default_theme | string | to_json }},
 	"default_country_code": {{ matrix_client_element_default_country_code | string | to_json }},
-	"permalinkPrefix": {{ matrix_client_element_permalinkPrefix | string | to_json }},
+	"permalink_prefix": {{ matrix_client_element_permalink_prefix | string | to_json }},
 	"disable_custom_urls": {{ matrix_client_element_disable_custom_urls | to_json }},
 	"disable_guests": {{ matrix_client_element_disable_guests | to_json }},
 	"brand": {{ matrix_client_element_brand | to_json }},