diff --git a/guides/source/active_record_validations.md b/guides/source/active_record_validations.md
index 84925072f2..67cc6a4db3 100644
--- a/guides/source/active_record_validations.md
+++ b/guides/source/active_record_validations.md
@@ -470,7 +470,7 @@ point number. To specify that only integral numbers are allowed set
 If you set `:only_integer` to `true`, then it will use the
 
 ```ruby
-/\A[+-]?\d+\Z/
+/\A[+-]?\d+\z/
 ```
 
 regular expression to validate the attribute's value. Otherwise, it will try to