diff --git a/vnc_lite.html b/vnc_lite.html
index d817885d..d59828e3 100644
--- a/vnc_lite.html
+++ b/vnc_lite.html
@@ -206,9 +206,9 @@
             var powerbuttons;
             powerbuttons = document.getElementById('noVNC_power_buttons');
             if (rfb.capabilities.power) {
-                xvpbuttons.className= "noVNC_shown";
+                powerbuttons.className= "noVNC_shown";
             } else {
-                xvpbuttons.className = "noVNC_hidden";
+                powerbuttons.className = "noVNC_hidden";
             }
         }