diff --git a/reference/pdo/pdostatement/execute.xml b/reference/pdo/pdostatement/execute.xml
index 515ce2ee3b..56aa401a61 100644
--- a/reference/pdo/pdostatement/execute.xml
+++ b/reference/pdo/pdostatement/execute.xml
@@ -163,7 +163,7 @@ $sth->execute();
 /* Execute a prepared statement using an array of values for an IN clause */
 $params = array(1, 21, 63, 171);
 /* Create a string for the parameter placeholders filled to the number of params */
-$place_holders = implode(',', array_fill(0, count($values), '?'));
+$place_holders = implode(',', array_fill(0, count($params), '?'));
 
 /*
     This prepares the statement with enough unnamed placeholders for every value