diff --git a/roles/custom/matrix-client-element/defaults/main.yml b/roles/custom/matrix-client-element/defaults/main.yml
index 1873dda5d..ac1630014 100644
--- a/roles/custom/matrix-client-element/defaults/main.yml
+++ b/roles/custom/matrix-client-element/defaults/main.yml
@@ -175,7 +175,7 @@ matrix_client_element_branding_auth_footer_links: ~  # noqa var-naming
 matrix_client_element_branding_auth_header_logo_url: "{{ matrix_client_element_welcome_logo }}"  # noqa var-naming
 
 # URL to Wallpaper, shown in background of welcome page
-matrix_client_element_branding_welcomeBackgroundUrl: ~  # noqa var-naming
+matrix_client_element_branding_welcome_background_url: ~  # noqa var-naming
 
 matrix_client_element_page_template_welcome_path: "{{ role_path }}/templates/welcome.html.j2"
 
diff --git a/roles/custom/matrix-client-element/tasks/validate_config.yml b/roles/custom/matrix-client-element/tasks/validate_config.yml
index 216143c3a..e2241b749 100644
--- a/roles/custom/matrix-client-element/tasks/validate_config.yml
+++ b/roles/custom/matrix-client-element/tasks/validate_config.yml
@@ -40,6 +40,7 @@
     - {'old': 'matrix_client_element_settingDefaults_custom_themes', 'new': 'matrix_client_element_setting_defaults_custom_themes'}
     - {'old': 'matrix_client_element_branding_authFooterLinks', 'new': 'matrix_client_element_branding_auth_footer_links'}
     - {'old': 'matrix_client_element_branding_authHeaderLogoUrl', 'new': 'matrix_client_element_branding_auth_header_logo_url'}
+    - {'old': 'matrix_client_element_branding_welcomeBackgroundUrl', 'new': 'matrix_client_element_branding_welcome_background_url'}
 
 - 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 d41523a73..883c89bfc 100644
--- a/roles/custom/matrix-client-element/templates/config.json.j2
+++ b/roles/custom/matrix-client-element/templates/config.json.j2
@@ -44,6 +44,6 @@
 	"branding": {
 		"auth_footer_links": {{ matrix_client_element_branding_auth_footer_links | to_json }},
 		"auth_header_logo_url": {{ matrix_client_element_branding_auth_header_logo_url | to_json }},
-		"welcomeBackgroundUrl": {{ matrix_client_element_branding_welcomeBackgroundUrl | to_json }}
+		"welcome_background_url": {{ matrix_client_element_branding_welcome_background_url | to_json }}
 	}
 }