diff --git a/htdocs/core/class/dolgraph.class.php b/htdocs/core/class/dolgraph.class.php
index 8b7bc4acf18..d7850871ee0 100644
--- a/htdocs/core/class/dolgraph.class.php
+++ b/htdocs/core/class/dolgraph.class.php
@@ -891,6 +891,7 @@ class DolGraph
 	private function draw_jflot($file, $fileurl)
 	{
         // phpcs:enable
+		global $langs;
 
 		dol_syslog(get_class($this)."::draw_jflot this->type=".join(',', $this->type)." this->MaxValue=".$this->MaxValue);