diff --git a/ajax.php b/ajax.php
index 078cb21..f6b63fd 100644
--- a/ajax.php
+++ b/ajax.php
@@ -41,11 +41,11 @@
         $limit->rateLimit($rateLimit);
 
         // execute command
-        $output = $lg->$_GET['cmd']($_GET['host']);
+        $output = $lg->{$_GET['cmd']}($_GET['host']);
         if ($output) {
             exit();
         }
     }
 }
 // report error
-exit('Unauthorized request');
\ No newline at end of file
+exit('Unauthorized request');