diff --git a/src/servers/media/media_server.h b/src/servers/media/media_server.h
index bc2485df58..011da1f7ed 100644
--- a/src/servers/media/media_server.h
+++ b/src/servers/media/media_server.h
@@ -4,9 +4,13 @@ class NodeManager;
 class BufferManager;
 class NotificationManager;
 class MMediaFilesManager;
+class AddOnManager;
+class FormatManager;
 
 extern AppManager *				gAppManager;
 extern NodeManager *			gNodeManager;
 extern BufferManager *			gBufferManager;
 extern NotificationManager *	gNotificationManager;
 extern MMediaFilesManager *		gMMediaFilesManager;
+extern AddOnManager *gAddOnManager;
+extern FormatManager *gFormatManager;