diff --git a/dbms/src/Storages/Transaction/tests/gtest_tidb_collator.cpp b/dbms/src/Storages/Transaction/tests/gtest_tidb_collator.cpp
index 904cefb26ef..0ba71d6bbbb 100644
--- a/dbms/src/Storages/Transaction/tests/gtest_tidb_collator.cpp
+++ b/dbms/src/Storages/Transaction/tests/gtest_tidb_collator.cpp
@@ -237,7 +237,7 @@ void testCollator()
                     }
                     {
                         strs.resize(strs.size() + s.size());
-                        memcpySmallAllowReadWriteOverflow15(
+                        std::memcpy(
                             &strs[strs.size() - s.size()],
                             s.data(),
                             s.size());