diff --git a/phpBB/docs/coding-guidelines.html b/phpBB/docs/coding-guidelines.html
index 9b5c668880..d90f4d4d32 100644
--- a/phpBB/docs/coding-guidelines.html
+++ b/phpBB/docs/coding-guidelines.html
@@ -2387,7 +2387,7 @@ if (utf8_case_fold_nfc($string1) == utf8_case_fold_nfc($string2))
 		You have <code>[1/21/31] slon</code>, <code>[2/3/4] slona</code>, <code>[0/5/6] slonova</code> and <code>[7/8/9/11] ...</code> and some more difficult rules.
 	</p>
 
-	<p>The <a href="https://wiki.phpbb.com/Plural_Rules">plural system</a> takes care of this and can be used as follows:</p>
+	<p>The <a href="https://area51.phpbb.com/docs/dev/32x/language/plurals.html">plural system</a> takes care of this and can be used as follows:</p>
 
 	<p>The PHP code will basically look like this:</p>
 
diff --git a/phpBB/includes/functions_compatibility.php b/phpBB/includes/functions_compatibility.php
index 4b085a6050..4fe7e71117 100644
--- a/phpBB/includes/functions_compatibility.php
+++ b/phpBB/includes/functions_compatibility.php
@@ -488,7 +488,7 @@ function phpbb_realpath($path)
  * Determine which plural form we should use.
  * For some languages this is not as simple as for English.
  *
- * @param $rule		int			ID of the plural rule we want to use, see http://wiki.phpbb.com/Plural_Rules#Plural_Rules
+ * @param $rule		int			ID of the plural rule we want to use, see https://area51.phpbb.com/docs/dev/32x/language/plurals.html
  * @param $number	int|float	The number we want to get the plural case for. Float numbers are floored.
  * @return	int		The plural-case we need to use for the number plural-rule combination
  *
diff --git a/phpBB/language/en/common.php b/phpBB/language/en/common.php
index 709b7d9731..af9f8fe187 100644
--- a/phpBB/language/en/common.php
+++ b/phpBB/language/en/common.php
@@ -48,7 +48,7 @@ $lang = array_merge($lang, array(
 	'USER_LANG'			=> 'en-gb',
 
 	// You can define different rules for the determination of plural forms here.
-	// See http://wiki.phpbb.com/Plural_Rules for more information
+	// See https://area51.phpbb.com/docs/dev/32x/language/plurals.html for more information
 	// or ask the translation manager for help.
 	'PLURAL_RULE'		=> 1,