diff --git a/htdocs/includes/evalmath/evalmath.class.php b/htdocs/core/class/evalmath.class.php
similarity index 100%
rename from htdocs/includes/evalmath/evalmath.class.php
rename to htdocs/core/class/evalmath.class.php
diff --git a/htdocs/includes/evalmath/README.md b/htdocs/includes/evalmath/README.md
deleted file mode 100755
index 6011e3fb676..00000000000
--- a/htdocs/includes/evalmath/README.md
+++ /dev/null
@@ -1,11 +0,0 @@
-evalmath.class.php
-==================
-
-Version 1.0
-
-Taken from http://www.phpclasses.org/browse/file/11680.html, cred to Miles Kaufmann
-
-This repository is cloned for two reasons:
-
-1. To allow downloading the code without signing in to phpclasses.org.
-2. To add very small improvements to the code.
diff --git a/htdocs/product/dynamic_price/class/price_parser.class.php b/htdocs/product/dynamic_price/class/price_parser.class.php
index d0eae2f3b17..6659dc56054 100644
--- a/htdocs/product/dynamic_price/class/price_parser.class.php
+++ b/htdocs/product/dynamic_price/class/price_parser.class.php
@@ -20,7 +20,7 @@
  *	\ingroup    product
  *	\brief      File of class to calculate prices using expression
  */
-require_once DOL_DOCUMENT_ROOT.'/includes/evalmath/evalmath.class.php';
+require_once DOL_DOCUMENT_ROOT.'/core/class/evalmath.class.php';
 require_once DOL_DOCUMENT_ROOT.'/fourn/class/fournisseur.product.class.php';
 require_once DOL_DOCUMENT_ROOT.'/product/dynamic_price/class/price_expression.class.php';
 require_once DOL_DOCUMENT_ROOT.'/product/dynamic_price/class/price_global_variable.class.php';