1 files changed, 3 insertions, 1 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/mysql/database_statements.rb b/activerecord/lib/active_record/connection_adapters/mysql/database_statements.rb
index a14394fe04..2132e5d248 100644
--- a/activerecord/lib/active_record/connection_adapters/mysql/database_statements.rb
+++ b/activerecord/lib/active_record/connection_adapters/mysql/database_statements.rb
@@ -61,7 +61,9 @@ module ActiveRecord
 
         def exec_delete(sql, name = nil, binds = [])
           if without_prepared_statement?(binds)
-            execute_and_free(sql, name) { @connection.affected_rows }
+            @lock.synchronize do
+              execute_and_free(sql, name) { @connection.affected_rows }
+            end
           else
             exec_stmt_and_free(sql, name, binds) { |stmt| stmt.affected_rows }
           end