diff --git a/PV_Visu/module.php b/PV_Visu/module.php
index 222c9db..d826b0c 100644
--- a/PV_Visu/module.php
+++ b/PV_Visu/module.php
@@ -25,7 +25,7 @@ class PV_Visu extends IPSModule
             $vid = $this->ReadPropertyInteger($prop);
             if ($vid > 0) {
                 // Register event for variable update
-                $this->RegisterMessage(\$vid, VM_UPDATE);
+                $this->RegisterMessage($vid, VM_UPDATE);
             }
         }
     }