diff --git a/htdocs/includes/tcpdi/tcpdi_parser.php b/htdocs/includes/tcpdi/tcpdi_parser.php
index 13e9839f2b4..6d3cf789b6a 100644
--- a/htdocs/includes/tcpdi/tcpdi_parser.php
+++ b/htdocs/includes/tcpdi/tcpdi_parser.php
@@ -1373,7 +1373,7 @@ class tcpdi_parser {
     			return false;
     		} else {
                 $res = $this->_getPageRotation($obj[1][1]['/Parent']);
-                if ($res[0] == PDF_TYPE_OBJECT)
+                if ($res && $res[0] == PDF_TYPE_OBJECT)
                     return $res[1];
                 return $res;
     		}