diff --git a/htdocs/core/class/evalmath.class.php b/htdocs/core/class/evalmath.class.php
index c42612afda8..5c659344465 100644
--- a/htdocs/core/class/evalmath.class.php
+++ b/htdocs/core/class/evalmath.class.php
@@ -372,7 +372,7 @@ class EvalMath
 	/**
 	 * Evaluate postfix notation
 	 *
-	 * @param string $tokens      	An array of expression to evaluate ('operators'). The operand are into ->stack.
+	 * @param array $tokens      	Expression
 	 * @param array $vars       	Array
 	 * @return string 				Output
 	 */