diff --git a/rules/S1542/vb6/rule.adoc b/rules/S1542/vb6/rule.adoc
index 49a3c46ddbf..113584b3aed 100644
--- a/rules/S1542/vb6/rule.adoc
+++ b/rules/S1542/vb6/rule.adoc
@@ -4,7 +4,7 @@ include::../description.adoc[]
 
 === Noncompliant code example
 
-With default provided regular expression: ^[A-Z][a-zA-Z0-9_]*$
+With default provided regular expression: ^([A-Z][a-zA-Z0-9_]*)|([a-z][a-zA-Z0-9]*_[A-Z][a-zA-Z]*)$
 
 
 [source,vb6]