diff --git a/htdocs/product/dynamic_price/class/price_parser.class.php b/htdocs/product/dynamic_price/class/price_parser.class.php
index aba86bfd97e..f2243ba1c09 100644
--- a/htdocs/product/dynamic_price/class/price_parser.class.php
+++ b/htdocs/product/dynamic_price/class/price_parser.class.php
@@ -178,6 +178,9 @@ class PriceParser
 			$values["global_".$entry->code] = $entry->value;
 		}
 
+		//Remove internal variables
+		unset($values["supplier_id"]);
+
 		//Prepare the lib, parameters and values
 		$em = new EvalMath();
 		$em->suppress_errors = true; //Don't print errors on page