diff --git a/packages/analytics-browser-test/test/index.test.ts b/packages/analytics-browser-test/test/index.test.ts
index 71b2c469d..6bb297049 100644
--- a/packages/analytics-browser-test/test/index.test.ts
+++ b/packages/analytics-browser-test/test/index.test.ts
@@ -28,6 +28,7 @@ describe('integration', () => {
   beforeEach(() => {
     client = amplitude.createInstance();
     apiKey = UUID();
+    Object.defineProperty(document, 'referrer', { value: 'a.b.c', configurable: true });
   });
 
   afterEach(() => {
diff --git a/packages/plugin-web-attribution-browser/src/helpers.ts b/packages/plugin-web-attribution-browser/src/helpers.ts
index 860a55af5..4c72eb4f8 100644
--- a/packages/plugin-web-attribution-browser/src/helpers.ts
+++ b/packages/plugin-web-attribution-browser/src/helpers.ts
@@ -31,7 +31,7 @@ export const isNewCampaign = (
   }
 
   //In the same session, no referrer should not override or unset any persisting query params
-  if (!isNewSession && !referring_domain) {
+  if (!isNewSession && !referrer) {
     return false;
   }