diff --git a/js/misc/loginManager.js b/js/misc/loginManager.js
index 6d9316a24..68d3d46d9 100644
--- a/js/misc/loginManager.js
+++ b/js/misc/loginManager.js
@@ -222,7 +222,7 @@ const LoginManagerConsoleKit = new Lang.Class({
     },
 
     canSuspend: function(asyncCallback) {
-        return false;
+        asyncCallback(false);
     },
 
     powerOff: function() {