diff --git a/includes/polling/applications/ntp-server.inc.php b/includes/polling/applications/ntp-server.inc.php
index 307d8f53d2..17f23283ab 100644
--- a/includes/polling/applications/ntp-server.inc.php
+++ b/includes/polling/applications/ntp-server.inc.php
@@ -16,7 +16,7 @@ try {
     $legacy = $e->getOutput();
 
     $ntp = [
-        data => [],
+        'data' => [],
     ];
 
     [$ntp['data']['stratum'], $ntp['data']['offset'], $ntp['data']['frequency'], $ntp['data']['jitter'],