diff --git a/stacks/lail-apps/paheko/docker-compose.yaml b/stacks/lail-apps/paheko/docker-compose.yaml
index 5f57373..c544e96 100644
--- a/stacks/lail-apps/paheko/docker-compose.yaml
+++ b/stacks/lail-apps/paheko/docker-compose.yaml
@@ -13,7 +13,7 @@ services:
           <?php
             const SHOW_ERRORS = false;
             const SQLITE_JOURNAL_MODE = 'WAL';
-            const OIDC_CLIENT_BUTTON = '${PAHEKO_OIDC_CLIENT_BUTTON}' ?: 'Se connecter avec le SSO LAIL';
+            const OIDC_CLIENT_BUTTON = '${PAHEKO_OIDC_CLIENT_BUTTON:-Se connecter avec le SSO LAIL}';
             const OIDC_CLIENT_URL = '${PAHEKO_OIDC_CLIENT_URL}';
             const OIDC_CLIENT_ID = '${PAHEKO_OIDC_CLIENT_ID}';
             const OIDC_CLIENT_SECRET = '${PAHEKO_OIDC_CLIENT_SECRET}';