{ memcached_literal_param("touch ") },
{ memcached_array_string(instance->root->_namespace), memcached_array_size(instance->root->_namespace) },
{ key, key_length },
- { expiration_buffer, expiration_buffer_length },
+ { expiration_buffer, size_t(expiration_buffer_length) },
{ memcached_literal_param("\r\n") }
};