diff --git a/htdocs/core/class/html.formfile.class.php b/htdocs/core/class/html.formfile.class.php
index 73198771b93..7559179c87d 100644
--- a/htdocs/core/class/html.formfile.class.php
+++ b/htdocs/core/class/html.formfile.class.php
@@ -131,7 +131,7 @@ class FormFile
             $out .= '<input class="flat minwidth400" type="file"';
             $out .= ((! empty($conf->global->MAIN_DISABLE_MULTIPLE_FILEUPLOAD) || $conf->browser->layout != 'classic')?' name="userfile"':' name="userfile[]" multiple');
             $out .= (empty($conf->global->MAIN_UPLOAD_DOC) || empty($perm)?' disabled':'');
-            $out .= (!empty($accept)?' accept="'.$accept.'"':'accept=""');
+            $out .= (!empty($accept)?' accept="'.$accept.'"':' accept=""');
             $out .= '>';
             $out .= ' ';
             $out .= '<input type="submit" class="button" name="sendit" value="'.$langs->trans("Upload").'"';