diff --git a/docs/sources/variables/filter-variables-with-regex.md b/docs/sources/variables/filter-variables-with-regex.md
index 299b1d5891f..eadbfe7cf16 100644
--- a/docs/sources/variables/filter-variables-with-regex.md
+++ b/docs/sources/variables/filter-variables-with-regex.md
@@ -26,7 +26,7 @@ backend_04
 Regex:
 
 ```regex
-/.*[01|02]/
+/(01|02)$/
 ```
 
 Result: