diff --git a/libs/langchain/langchain/retrievers/google_cloud_enterprise_search.py b/libs/langchain/langchain/retrievers/google_cloud_enterprise_search.py
index 4e9c478d2b..faf10e1be7 100644
--- a/libs/langchain/langchain/retrievers/google_cloud_enterprise_search.py
+++ b/libs/langchain/langchain/retrievers/google_cloud_enterprise_search.py
@@ -156,7 +156,10 @@ class GoogleCloudEnterpriseSearchRetriever(BaseRetriever):
                 else "extractive_segments"
             )
 
-            for chunk in derived_struct_data.get(chunk_type, []):
+            if chunk_type not in derived_struct_data:
+                continue
+
+            for chunk in derived_struct_data[chunk_type]:
                 doc_metadata["source"] = derived_struct_data.get("link", "")
 
                 if chunk_type == "extractive_answers":