diff --git a/cpp/src/db/meta/SqliteMetaImpl.cpp b/cpp/src/db/meta/SqliteMetaImpl.cpp
index 2806bf63633eb5a218f9798225efa0bf6e483359..a06c391ca5f2c68003313d7fb63413a540e8553c 100644
--- a/cpp/src/db/meta/SqliteMetaImpl.cpp
+++ b/cpp/src/db/meta/SqliteMetaImpl.cpp
@@ -420,7 +420,7 @@ Status SqliteMetaImpl::DescribeTableIndex(const std::string &table_id, TableInde
         if (groups.size() == 1) {
             index.engine_type_ = std::get<0>(groups[0]);
             index.nlist_ = std::get<1>(groups[0]);
-            index.metric_type_ = std::get<3>(groups[0]);
+            index.metric_type_ = std::get<2>(groups[0]);
         } else {
             return Status::NotFound("Table " + table_id + " not found");
         }