diff --git a/ChangeLog b/ChangeLog
index abbe486707f..28d86310494 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -10,7 +10,8 @@ English Dolibarr ChangeLog
 - Fix: box of customer and propsects were not correctly disabled.
 - Fix: [ bug #1618 ] PHP Error thrown when saving a barcode
 - Fix: Civility & birthdate wasn't save into adherent module.
-- Fix: webservice Thirdparty parameter lastname for invidual creation is now lastname and not ref 
+- Fix: webservice Thirdparty parameter lastname for invidual creation is now lastname and not ref
+- Fix: Chars - is no more allowed into value for code for extra fields.
 
 ***** ChangeLog for 3.6.1 compared to 3.6.* *****
 For users:
diff --git a/htdocs/core/class/extrafields.class.php b/htdocs/core/class/extrafields.class.php
index 16583c0703c..8ce0a1b3b45 100644
--- a/htdocs/core/class/extrafields.class.php
+++ b/htdocs/core/class/extrafields.class.php
@@ -154,7 +154,7 @@ class ExtraFields
 	{
 		$table=$elementtype.'_extrafields';
 
-		if (! empty($attrname) && preg_match("/^\w[a-zA-Z0-9-_]*$/",$attrname) && ! is_numeric($attrname))
+		if (! empty($attrname) && preg_match("/^\w[a-zA-Z0-9_]*$/",$attrname) && ! is_numeric($attrname))
 		{
 			if ($type=='boolean') {
 				$typedb='int';