diff --git a/src/lib/fetch-handler.js b/src/lib/fetch-handler.js
index 454979e0..d07f9542 100755
--- a/src/lib/fetch-handler.js
+++ b/src/lib/fetch-handler.js
@@ -24,7 +24,7 @@ class AbortError extends Error {
 const patchNativeFetchForSafari = (nativeFetch) => {
 	// Try to patch fetch only on Safari
 	if (
-		!navigator ||
+		typeof navigator === 'undefined' ||
 		!navigator.vendor ||
 		navigator.vendor !== 'Apple Computer, Inc.'
 	) {