diff --git a/src/AggregateFunctions/AggregateFunctionUniqCombined.cpp b/src/AggregateFunctions/AggregateFunctionUniqCombined.cpp
index 3c1c916e377..ff3b463e906 100644
--- a/src/AggregateFunctions/AggregateFunctionUniqCombined.cpp
+++ b/src/AggregateFunctions/AggregateFunctionUniqCombined.cpp
@@ -143,7 +143,6 @@ namespace
 
 void registerAggregateFunctionUniqCombined(AggregateFunctionFactory & factory)
 {
-    using namespace std::placeholders;
     factory.registerFunction("uniqCombined",
         [](const std::string & name, const DataTypes & argument_types, const Array & parameters, const Settings *)
         {
diff --git a/src/Client/ReplxxLineReader.cpp b/src/Client/ReplxxLineReader.cpp
index 49f44e3d0f9..681d06ce583 100644
--- a/src/Client/ReplxxLineReader.cpp
+++ b/src/Client/ReplxxLineReader.cpp
@@ -293,7 +293,6 @@ ReplxxLineReader::ReplxxLineReader(
     , word_break_characters(word_break_characters_)
     , editor(getEditor())
 {
-    using namespace std::placeholders;
     using Replxx = replxx::Replxx;
 
     if (!history_file_path.empty())
diff --git a/src/Dictionaries/HashedArrayDictionary.cpp b/src/Dictionaries/HashedArrayDictionary.cpp
index 68c347af9df..21016025d96 100644
--- a/src/Dictionaries/HashedArrayDictionary.cpp
+++ b/src/Dictionaries/HashedArrayDictionary.cpp
@@ -900,8 +900,6 @@ void registerDictionaryArrayHashed(DictionaryFactory & factory)
             return std::make_unique<HashedArrayDictionary<DictionaryKeyType::Complex>>(dict_id, dict_struct, std::move(source_ptr), configuration);
     };
 
-    using namespace std::placeholders;
-
     factory.registerLayout("hashed_array",
         [=](auto && a, auto && b, auto && c, auto && d, DictionarySourcePtr e, ContextPtr global_context, bool /*created_from_ddl*/)
         {
diff --git a/src/Dictionaries/HashedDictionary.cpp b/src/Dictionaries/HashedDictionary.cpp
index 562857cd790..0556e2bb266 100644
--- a/src/Dictionaries/HashedDictionary.cpp
+++ b/src/Dictionaries/HashedDictionary.cpp
@@ -1246,8 +1246,6 @@ void registerDictionaryHashed(DictionaryFactory & factory)
         }
     };
 
-    using namespace std::placeholders;
-
     factory.registerLayout("hashed",
         [=](auto && a, auto && b, auto && c, auto && d, DictionarySourcePtr e, ContextPtr global_context, bool /*created_from_ddl*/){ return create_layout(a, b, c, d, std::move(e), global_context, DictionaryKeyType::Simple, /* sparse = */ false); }, false);
     factory.registerLayout("sparse_hashed",