Can a server wide setting of ‘Max Degree of Parallelism’ = 1 cause Brent Ozar’s sp_BlitzCache to flag execution plan as ‘forced-serialization’?

I am using Brent Ozar’s sp_BlitzCache store procedure and I’m attempting to nail down why it is reporting:

“Something in your plan is forcing a serial query. Further
investigation is needed if this is not by design.”

Upon investigation I found that the server configuration has set:

'Max Degree of Parallelism = 1' 

(That is on my laundry list to configure correctly. It is a hold over from days of ignorance.)

Is that setting the cause of Brent to report forced serialization?

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