diff --git a/includes/OutputPage.php b/includes/OutputPage.php
index 72940cc7a92..2aaaf15c60c 100644
--- a/includes/OutputPage.php
+++ b/includes/OutputPage.php
@@ -1875,7 +1875,7 @@ class OutputPage {
 	 *
 	 * In the $wrap, $1 is replaced with the first message, $2 with the second, and so
 	 * on. The subsequent arguments may either be strings, in which case they are the
-	 * message names, or an arrays, in which case the first element is the message name,
+	 * message names, or arrays, in which case the first element is the message name,
 	 * and subsequent elements are the parameters to that message.
 	 *
 	 * The special named parameter 'options' in a message specification array is passed