diff --git a/htdocs/core/class/html.formfile.class.php b/htdocs/core/class/html.formfile.class.php
index d5b7b03ae42..c53a5562997 100644
--- a/htdocs/core/class/html.formfile.class.php
+++ b/htdocs/core/class/html.formfile.class.php
@@ -67,11 +67,12 @@ class FormFile
 	 *  @param  int			$addcancel		1=Add 'Cancel' button
 	 *	@param	int			$sectionid		If upload must be done inside a particular ECM section (is sectionid defined, sectiondir must not be)
 	 * 	@param	int			$perm			Value of permission to allow upload
-	 *  @param  int			$size          		Length of input file area. Deprecated.
+	 *  @param  int			$size          	Length of input file area. Deprecated.
 	 *  @param	Object		$object			Object to use (when attachment is done on an element)
 	 *  @param	string		$options		Add an option column
-	 *  @param	integer		$useajax		Use fileupload ajax (0=never, 1=if enabled, 2=always whatever is option). @deprecated 2 should never be used and if 1 is used, option should no be enabled.
-	 *  @param	string		$savingdocmask		Mask to use to define output filename. For example 'XXXXX-__YYYYMMDD__-__file__'
+	 *  @param	integer		$useajax		Use fileupload ajax (0=never, 1=if enabled, 2=always whatever is option).
+     *                                      Deprecated 2 should never be used and if 1 is used, option should no be enabled.
+	 *  @param	string		$savingdocmask	Mask to use to define output filename. For example 'XXXXX-__YYYYMMDD__-__file__'
 	 *  @param	integer		$linkfiles		1=Also add form to link files, 0=Do not show form to link files
 	 *  @param	string		$htmlname		Name and id of HTML form ('formuserfile' by default, 'formuserfileecm' when used to upload a file in ECM)
 	 *  @param	string		$accept			Specifies the types of files accepted (This is not a security check but an user interface facility. eg '.pdf,image/*' or '.png,.jpg' or 'video/*')
@@ -84,6 +85,10 @@ class FormFile
 		global $conf,$langs, $hookmanager;
 		$hookmanager->initHooks(array('formfile'));
 
+        // Deprecation warning
+        if ($useajax == 2) {
+            dol_syslog(__METHOD__ . ": using 2 for useajax is deprecated and should be not used", LOG_WARNING);
+        }
 
 		if (! empty($conf->browser->layout) && $conf->browser->layout != 'classic') $useajax=0;