diff --git a/docs/en/topics/security.md b/docs/en/topics/security.md
index 00633034b..20e53f38d 100644
--- a/docs/en/topics/security.md
+++ b/docs/en/topics/security.md
@@ -432,7 +432,7 @@ a [api:PasswordValidator]:
 	$validator = new PasswordValidator();
 	$validator->minLength(7);
 	$validator->checkHistoricalPasswords(6);
-	$validator->characterStrength('lowercase','uppercase','digits','punctuation');
+	$validator->characterStrength(3, array("lowercase", "uppercase", "digits", "punctuation"));
 	Member::set_password_validator($validator);
 
 In addition, you can tighten password security with the following configuration settings:
diff --git a/security/PasswordValidator.php b/security/PasswordValidator.php
index d98d64443..4722cbd33 100644
--- a/security/PasswordValidator.php
+++ b/security/PasswordValidator.php
@@ -7,7 +7,7 @@
  * $pwdVal = new PasswordValidator();
  * $pwdValidator->minLength(7);
  * $pwdValidator->checkHistoricalPasswords(6);
- * $pwdValidator->characterStrength('lowercase','uppercase','digits','punctuation');
+ * $pwdValidator->characterStrength(3, array("lowercase", "uppercase", "digits", "punctuation"));
  * 
  * Member::set_password_validator($pwdValidator);
  * </code>