diff --git a/projects/lib/src/oauth-service.ts b/projects/lib/src/oauth-service.ts
index 7f0a204d..a368615b 100644
--- a/projects/lib/src/oauth-service.ts
+++ b/projects/lib/src/oauth-service.ts
@@ -1455,7 +1455,7 @@ export class OAuthService extends AuthConfig implements OnDestroy {
             options.customHashFragment.substring(1) :
             window.location.search;
 
-        const parts = this.getCodePartsFromUrl(window.location.search);
+        const parts = this.getCodePartsFromUrl(querySource);
 
         const code = parts['code'];
         const state = parts['state'];