diff --git a/src/utils/configUtils.ts b/src/utils/configUtils.ts
index db957caa47..0afecbc117 100644
--- a/src/utils/configUtils.ts
+++ b/src/utils/configUtils.ts
@@ -6,7 +6,7 @@ export function showDonationLink(): boolean {
 }
 
 export function isSafari(): boolean {
-    return navigator.vendor === "Apple Computer, Inc.";
+    return typeof(navigator) !== "undefined" && navigator.vendor === "Apple Computer, Inc.";
 }
 
 export function keybindEquals(first: Keybind, second: Keybind): boolean {