diff --git a/src/digital-components/sierra-webchat/sierra-webchat.vue b/src/digital-components/sierra-webchat/sierra-webchat.vue
index 162367a62..46e9350d8 100644
--- a/src/digital-components/sierra-webchat/sierra-webchat.vue
+++ b/src/digital-components/sierra-webchat/sierra-webchat.vue
@@ -140,7 +140,7 @@ export default {
             const transfer = event.detail;
             if (
                 window.embeddedservice_bootstrap &&
-                typeof window.embeddedservice_bootstrap.bootstrapEmbeddedService === "function"
+                window.embeddedservice_bootstrap.prechatAPI
             ) {
                 if (
                     transfer &&