How to not count the null/empty value in visualizations

Hi,

I just noticed that in my visualizations, when I use the Count Distinct to display values, it's actually counting one more for the Null/Empty values. I tried making the values "" or Null, from the reporting side, and it doesn't matter, the "value" is still counted.

I know it's just one more value, but that makes it not 100% accurate to what my listing is backing up.

Is there a way to force the Count to not count the Null/Empty value in the visualizations?

Thanks in advance!

Brenda