diff --git a/frontend/common/KeyboardShortcuts.js b/frontend/common/KeyboardShortcuts.js
index 0f6feaf62d..e099161923 100644
--- a/frontend/common/KeyboardShortcuts.js
+++ b/frontend/common/KeyboardShortcuts.js
@@ -1,5 +1,5 @@
 // @ts-ignore
-export let is_mac_keyboard = /Mac/i.test(navigator.userAgentData.platform ?? navigator.platform)
+export let is_mac_keyboard = /Mac/i.test(navigator.userAgentData?.platform ?? navigator.platform)
 
 export let control_name = is_mac_keyboard ? "⌃" : "Ctrl"
 export let ctrl_or_cmd_name = is_mac_keyboard ? "⌘" : "Ctrl"