diff --git a/htdocs/core/lib/project.lib.php b/htdocs/core/lib/project.lib.php
index 56aa24a8523..710e2eb8ed1 100644
--- a/htdocs/core/lib/project.lib.php
+++ b/htdocs/core/lib/project.lib.php
@@ -208,7 +208,7 @@ function project_prepare_head(Project $project, $moreparam = '')
 		$h++;
 	}
 
-	if ($conf->eventorganization->enabled && !empty($project->usage_organize_event)) {
+	if (!empty($conf->eventorganization->enabled) && !empty($project->usage_organize_event)) {
 		$langs->load('eventorganization');
 		$head[$h][0] = DOL_URL_ROOT . '/eventorganization/conferenceorbooth_list.php?projectid=' . $project->id;
 		$head[$h][1] = $langs->trans("EventOrganization");