diff --git a/htdocs/includes/tcpdi/tcpdi_parser.php b/htdocs/includes/tcpdi/tcpdi_parser.php
index 13e9839f2b4..174c496d4f4 100644
--- a/htdocs/includes/tcpdi/tcpdi_parser.php
+++ b/htdocs/includes/tcpdi/tcpdi_parser.php
@@ -1365,7 +1365,7 @@ class tcpdi_parser {
     	$obj = $this->getObjectVal($obj);
     	if (isset ($obj[1][1]['/Rotate'])) {
     		$res = $this->getObjectVal($obj[1][1]['/Rotate']);
-    		if ($res[0] == PDF_TYPE_OBJECT)
+    		if (isset($res[0]) && $res[0] == PDF_TYPE_OBJECT)
                 return $res[1];
             return $res;
     	} else {
@@ -1373,7 +1373,7 @@ class tcpdi_parser {
     			return false;
     		} else {
                 $res = $this->_getPageRotation($obj[1][1]['/Parent']);
-                if ($res[0] == PDF_TYPE_OBJECT)
+                if (isset($res[0]) && $res[0] == PDF_TYPE_OBJECT)
                     return $res[1];
                 return $res;
     		}