diff --git a/dbms/src/Interpreters/Context.cpp b/dbms/src/Interpreters/Context.cpp
index 088ed1de0db61ffcee2df2d69f931e1fb93edaf2..a9b77d3ed194488f54569ec5f444bf0edfbee470 100644
--- a/dbms/src/Interpreters/Context.cpp
+++ b/dbms/src/Interpreters/Context.cpp
@@ -674,8 +674,6 @@ bool Context::isDatabaseExist(const String & database_name) const
 
 bool Context::isExternalTableExist(const String & table_name) const
 {
-    auto lock = getLock();
-
     return external_tables.end() != external_tables.find(table_name);
 }