diff --git a/main/inc/lib/main_api.lib.php b/main/inc/lib/main_api.lib.php
index 61a7d81bf0..571e856f23 100644
--- a/main/inc/lib/main_api.lib.php
+++ b/main/inc/lib/main_api.lib.php
@@ -135,6 +135,7 @@ define('TOOL_VISIO','visio');
 define('TOOL_VISIO_CONFERENCE','visio_conference');
 define('TOOL_VISIO_CLASSROOM','visio_classroom');
 define('TOOL_SURVEY','survey');
+define('TOOL_WIKI','wiki');
 
 // CONSTANTS defining dokeos sections
 define('SECTION_CAMPUS', 'mycampus');