diff --git a/htdocs/viewimage.php b/htdocs/viewimage.php
index fabd350f39f..29cf183eace 100644
--- a/htdocs/viewimage.php
+++ b/htdocs/viewimage.php
@@ -28,6 +28,7 @@
 */
 
 require_once("master.inc.php");
+require_once("main.inc.php");
 
 
 // C'est un wrapper, donc header vierge