diff --git a/internal/core/src/segcore/SegmentSealedImpl.cpp b/internal/core/src/segcore/SegmentSealedImpl.cpp
index 1422fde332ed..6137d6f56758 100644
--- a/internal/core/src/segcore/SegmentSealedImpl.cpp
+++ b/internal/core/src/segcore/SegmentSealedImpl.cpp
@@ -1561,17 +1561,20 @@ SegmentSealedImpl::mask_with_timestamps(BitsetType& bitset_chunk,
     // TODO change the
     AssertInfo(insert_record_.timestamps_.num_chunk() == 1,
                "num chunk not equal to 1 for sealed segment");
-    const auto& timestamps_data = insert_record_.timestamps_.get_chunk(0);
-    AssertInfo(timestamps_data.size() == get_row_count(),
+    auto timestamps_data =
+        (const milvus::Timestamp*)insert_record_.timestamps_.get_chunk_data(0);
+    auto timestamps_data_size = insert_record_.timestamps_.get_chunk_size(0);
+
+    AssertInfo(timestamps_data_size == get_row_count(),
                fmt::format("Timestamp size not equal to row count: {}, {}",
-                           timestamps_data.size(),
+                           timestamps_data_size,
                            get_row_count()));
     auto range = insert_record_.timestamp_index_.get_active_range(timestamp);
 
     // range == (size_, size_) and size_ is this->timestamps_.size().
     // it means these data are all useful, we don't need to update bitset_chunk.
     // It can be thought of as an OR operation with another bitmask that is all 0s, but it is not necessary to do so.
-    if (range.first == range.second && range.first == timestamps_data.size()) {
+    if (range.first == range.second && range.first == timestamps_data_size) {
         // just skip
         return;
     }
@@ -1582,7 +1585,7 @@ SegmentSealedImpl::mask_with_timestamps(BitsetType& bitset_chunk,
         return;
     }
     auto mask = TimestampIndex::GenerateBitset(
-        timestamp, range, timestamps_data.data(), timestamps_data.size());
+        timestamp, range, timestamps_data, timestamps_data_size);
     bitset_chunk |= mask;
 }