diff --git a/dbms/src/Dictionaries/CacheDictionary.cpp b/dbms/src/Dictionaries/CacheDictionary.cpp
index 7f1b17ffa92..4e188972d12 100644
--- a/dbms/src/Dictionaries/CacheDictionary.cpp
+++ b/dbms/src/Dictionaries/CacheDictionary.cpp
@@ -867,6 +867,8 @@ void CacheDictionary::update(const std::vector<Key> & requested_ids, std::unorde
 
             stream->readPrefix();
 
+            const ProfilingScopedWriteRWLock write_lock{rw_lock, ProfileEvents::DictCacheLockWriteNs};
+
             while (const auto block = stream->read())
             {
                 const auto id_column = typeid_cast<const ColumnUInt64 *>(block.safeGetByPosition(0).column.get());
@@ -881,8 +883,6 @@ void CacheDictionary::update(const std::vector<Key> & requested_ids, std::unorde
                         ext::range(0, attributes.size()),
                         [&block](size_t i) { return block.safeGetByPosition(i + 1).column.get(); });
 
-                const ProfilingScopedWriteRWLock write_lock{rw_lock, ProfileEvents::DictCacheLockWriteNs};
-
                 for (const auto i : ext::range(0, ids.size()))
                 {
                     const auto id = ids[i];