diff --git a/internal/core/src/segcore/ChunkedSegmentSealedImpl.cpp b/internal/core/src/segcore/ChunkedSegmentSealedImpl.cpp
index 1f6a1aa1e4..b31fec905e 100644
--- a/internal/core/src/segcore/ChunkedSegmentSealedImpl.cpp
+++ b/internal/core/src/segcore/ChunkedSegmentSealedImpl.cpp
@@ -896,7 +896,7 @@ ChunkedSegmentSealedImpl::vector_search(SearchInfo& search_info,
         // get index params for bm25 brute force
         std::map<std::string, std::string> index_info;
         if (search_info.metric_type_ == knowhere::metric::BM25) {
-            auto index_info =
+            index_info =
                 col_index_meta_->GetFieldIndexMeta(field_id).GetIndexParams();
         }
 
diff --git a/internal/core/src/segcore/SegmentSealedImpl.cpp b/internal/core/src/segcore/SegmentSealedImpl.cpp
index cc17593b77..ee8652da06 100644
--- a/internal/core/src/segcore/SegmentSealedImpl.cpp
+++ b/internal/core/src/segcore/SegmentSealedImpl.cpp
@@ -942,7 +942,7 @@ SegmentSealedImpl::vector_search(SearchInfo& search_info,
         // get index params for bm25 brute force
         std::map<std::string, std::string> index_info;
         if (search_info.metric_type_ == knowhere::metric::BM25) {
-            auto index_info =
+            index_info =
                 col_index_meta_->GetFieldIndexMeta(field_id).GetIndexParams();
         }