diff --git a/src/cloudron.js b/src/cloudron.js
index 24c09b330..fd1144a63 100644
--- a/src/cloudron.js
+++ b/src/cloudron.js
@@ -145,7 +145,15 @@ function isConfigured(callback) {
         var isConfigured = (config.isCustomDomain() && dnsConfig.provider === 'route53') ||
                         (!config.isCustomDomain() && dnsConfig.provider === 'caas');
 
-        callback(null, isConfigured);
+        // fallback for old caas cloudrons
+        if (!isConfigured && !config.isCustomDomain() && !dnsConfig.provider) {
+            settings.setDnsConfig({ provider: 'caas' }, function (error) {
+                if (error) return callback(error);
+                callback(null, true);
+            });
+        } else {
+            callback(null, isConfigured);
+        }
     });
 }