diff --git a/lib/tcpdf/tcpdf.php b/lib/tcpdf/tcpdf.php
index 0ee30bc0d15..4dedf41ff2a 100644
--- a/lib/tcpdf/tcpdf.php
+++ b/lib/tcpdf/tcpdf.php
@@ -4715,14 +4715,14 @@ class TCPDF {
 	 * Defines the page and position a link points to.
 	 * @param $link (int) The link identifier returned by AddLink()
 	 * @param $y (float) Ordinate of target position; -1 indicates the current position. The default value is 0 (top of page)
-	 * @param $page (int) Number of target page; -1 indicates the current page (default value). If you prefix a page number with the * character, then this page will not be changed when adding/deleting/moving pages.
+	 * @param $page (int|string) Number of target page; -1 indicates the current page (default value). If you prefix a page number with the * character, then this page will not be changed when adding/deleting/moving pages.
 	 * @public
 	 * @since 1.5
 	 * @see AddLink()
 	 */
 	public function SetLink($link, $y=0, $page=-1) {
 		$fixed = false;
-		if (!empty($page) AND ($page[0] == '*')) {
+		if (!empty($page) AND is_string($page) AND ($page[0] == '*')) {
 			$page = intval(substr($page, 1));
 			// this page number will not be changed when moving/add/deleting pages
 			$fixed = true;