diff --git a/wp-includes/comment.php b/wp-includes/comment.php
index 2cc74ad5..9c922b3d 100644
--- a/wp-includes/comment.php
+++ b/wp-includes/comment.php
@@ -1952,7 +1952,7 @@ function wp_get_current_commenter() {
 function wp_get_unapproved_comment_author_email() {
 	$commenter_email = '';
 
-	if ( ! empty( $_GET['unapproved'] ) && ! empty( $_GET['moderation-hash'] ) ) {
+	if ( ! empty( $_GET['unapproved'] ) && ! empty( $_GET['moderation-hash'] ) && ! is_array( $_GET['moderation-hash'] ) ) {
 		$comment_id = (int) $_GET['unapproved'];
 		$comment    = get_comment( $comment_id );