diff --git a/src/browser/starter.js b/src/browser/starter.js
index 1f36fa6d..f1140e4f 100644
--- a/src/browser/starter.js
+++ b/src/browser/starter.js
@@ -214,7 +214,7 @@ V86Starter.prototype.continue_init = async function(emulator, options)
         "cdrom": undefined,
     };
 
-    settings.acpi = options.acpi;
+    settings.acpi = options["acpi"];
     settings.load_devices = true;
     settings.log_level = options["log_level"];
     settings.memory_size = options["memory_size"] || 64 * 1024 * 1024;