diff --git a/plugins/mail/init.php b/plugins/mail/init.php
index 045fd7986..7da87ed57 100644
--- a/plugins/mail/init.php
+++ b/plugins/mail/init.php
@@ -86,7 +86,7 @@ class Mail extends Plugin {
 		print_hidden("method", "sendEmail");
 
 		$sth = $this->pdo->prepare("SELECT email, full_name FROM ttrss_users WHERE
-			id = " . $_SESSION["uid"]);
+			id = ?";
 		$sth->execute([$_SESSION['uid']]);
 
 		if ($row = $sth->fetch()) {