diff --git a/src/Microsoft.OpenApi.Hidi/OpenApiService.cs b/src/Microsoft.OpenApi.Hidi/OpenApiService.cs
index 78f48cd4c..9797ecd65 100644
--- a/src/Microsoft.OpenApi.Hidi/OpenApiService.cs
+++ b/src/Microsoft.OpenApi.Hidi/OpenApiService.cs
@@ -151,7 +151,7 @@ private static OpenApiDocument ApplyFilters(HidiOptions options, ILogger logger,
             }
             else if (postmanCollection != null)
             {
-                requestUrls = EnumerateJsonDocument(postmanCollection.RootElement, requestUrls);
+                requestUrls = EnumerateJsonDocument(postmanCollection.RootElement, new());
                 logger.LogTrace("Finished fetching the list of paths and Http methods defined in the Postman collection.");
             }