diff --git a/web/app/assets/javascripts/react-components/stores/PlatformStore.js.coffee b/web/app/assets/javascripts/react-components/stores/PlatformStore.js.coffee
index a8a0ad556..84366fc7e 100644
--- a/web/app/assets/javascripts/react-components/stores/PlatformStore.js.coffee
+++ b/web/app/assets/javascripts/react-components/stores/PlatformStore.js.coffee
@@ -16,7 +16,7 @@ logger = context.JK.logger
       if @serial_no?
         return @serial_no
 
-      if context.jamClient.jamBlasterSerialNo
+      if context.jamClient && context.jamClient.jamBlasterSerialNo
         @serial_no = context.jamClient.jamBlasterSerialNo()
       else
         @serial_no= false