diff --git a/activerecord/lib/active_record/tasks/mysql_database_tasks.rb b/activerecord/lib/active_record/tasks/mysql_database_tasks.rb
index 5b1eba634542e448e42f2918f6a23e3fbe0c3b8e..c25d87dd3ea1c3f03ce7842b22737b960f317e2f 100644
--- a/activerecord/lib/active_record/tasks/mysql_database_tasks.rb
+++ b/activerecord/lib/active_record/tasks/mysql_database_tasks.rb
@@ -66,7 +66,7 @@ def structure_dump(filename, extra_flags)
         end
 
         args.concat(["#{configuration['database']}"])
-        args.insert(0, Array(extra_flags)).flatten! if extra_flags
+        args.unshift(*extra_flags) if extra_flags
 
         run_cmd("mysqldump", args, "dumping")
       end
@@ -75,7 +75,7 @@ def structure_load(filename, extra_flags)
         args = prepare_command_options
         args.concat(["--execute", %{SET FOREIGN_KEY_CHECKS = 0; SOURCE #{filename}; SET FOREIGN_KEY_CHECKS = 1}])
         args.concat(["--database", "#{configuration['database']}"])
-        args.insert(0, Array(extra_flags)).flatten! if extra_flags
+        args.unshift(*extra_flags) if extra_flags
 
         run_cmd("mysql", args, "loading")
       end