diff --git a/_docs/_user_guide/engagement_tools/segments/regex.md b/_docs/_user_guide/engagement_tools/segments/regex.md
index 9206527c1a2..18836a7fc9d 100644
--- a/_docs/_user_guide/engagement_tools/segments/regex.md
+++ b/_docs/_user_guide/engagement_tools/segments/regex.md
@@ -137,6 +137,10 @@ $( document ).ready(function() {
 
 ## Frequently asked questions
 
+#### Does the `does not match regex` filter include blank values?
+
+No. If the value is blank, the user will not be included in the `does not match regex` filter.
+
 #### How do I filter for inbox-specific email addresses when segmenting?
 
 {% raw %}