diff --git a/htdocs/core/lib/functions.lib.php b/htdocs/core/lib/functions.lib.php
index 9c878615a19..cc4b2aac7f0 100644
--- a/htdocs/core/lib/functions.lib.php
+++ b/htdocs/core/lib/functions.lib.php
@@ -287,8 +287,14 @@ function dol_buildpath($path, $type=0)
 				//print $key.'-'.$dirroot.'/'.$path.'-'.$conf->file->dol_url_root[$type].'<br>'."\n";
 				if (file_exists($dirroot.'/'.$path))
 				{
-					if ($type == 1) $res=DOL_URL_ROOT.$conf->file->dol_url_root[$key].'/'.$path;
-					if ($type == 2) $res=DOL_MAIN_URL_ROOT.$conf->file->dol_url_root[$key].'/'.$path;
+					if ($type == 1)
+					{
+						$res=(preg_match('/^http/i',$conf->file->dol_url_root[$key])?'':DOL_URL_ROOT).$conf->file->dol_url_root[$key].'/'.$path;
+					}
+					if ($type == 2)
+					{
+						$res=(preg_match('/^http/i',$conf->file->dol_url_root[$key])?'':DOL_MAIN_URL_ROOT).$conf->file->dol_url_root[$key].'/'.$path;
+					}
 					break;
 				}
 			}