diff --git a/lib/Tools/Traits/TConsoleTree.php b/lib/Tools/Traits/TConsoleTree.php
index 96e512357..1b590a039 100644
--- a/lib/Tools/Traits/TConsoleTree.php
+++ b/lib/Tools/Traits/TConsoleTree.php
@@ -60,6 +60,7 @@ public function drawTree(
 		);
 
 		$output = new ConsoleOutput();
+		$prec = 0;
 
 		while (true) {
 			$node = $root->current();