diff --git a/packages/beacon-core/src/utils/multi-tab-channel.ts b/packages/beacon-core/src/utils/multi-tab-channel.ts
index 45267f2e1..2bbebf271 100644
--- a/packages/beacon-core/src/utils/multi-tab-channel.ts
+++ b/packages/beacon-core/src/utils/multi-tab-channel.ts
@@ -18,9 +18,9 @@ type BCMessage = {
 }
 
 const logger = new Logger('MultiTabChannel')
-const isMobile = /Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(
+const isMobile = typeof window === 'undefined' ? /Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(
   navigator.userAgent
-)
+) : false
 
 export class MultiTabChannel {
   private id: string = String(Date.now())