diff --git a/wp-includes/formatting.php b/wp-includes/formatting.php
index d0ac14a874..7e5a760a76 100644
--- a/wp-includes/formatting.php
+++ b/wp-includes/formatting.php
@@ -91,7 +91,7 @@ function wptexturize($text) {
 		if ( '"' != $closing_quote )
 			$dynamic[ '/"(\s|\S|\Z)/'              ] = $closing_quote . '$1'; // closing double quote
 		if ( "'" != $closing_single_quote )
-			$dynamic[ '/\'([\s.]|\Z)/'             ] = $closing_single_quote . '$2'; // closing single quote
+			$dynamic[ '/\'([\s.]|\Z)/'             ] = $closing_single_quote . '$1'; // closing single quote
 
 		$dynamic[ '/\b(\d+)x(\d+)\b/'              ] = '$1×$2'; // 9x9 (times)