Looks like the dream of an all-day McDonald's breakfast might be coming true. An internal memo sent by McDonald's Corp. to franchisees tells the store owners to get ready for a potential national launch of the morning menu, NRN reports.

Apparently, results from the all-day breakfast tests in San Diego and Nashville we "encouraging" enough to warrant national preparation. While it's not a guarantee that they'll make the national launch official, they're getting everyone ready in case it does happen.

According to NRN, McDonald's says that serving the breakfast menu all day is the number one request they get from customers. Currently, they serve breakfast until 10:30 a.m. every morning and 11:00 a.m. on weekends. Due to the having too many ingredients between the lunch menu and breakfast, serving an all-day breakfast menu would prove complicated for franchisees to execute.

Breakfast sales are typically consistent, despite decline in McDonalds' overall sales. If a breakfast does expand to an all-day menu, McDonald's might very well see a rise in sales.