diff --git a/htdocs/admin/dolistore/class/PSWebServiceLibrary.class.php b/htdocs/admin/dolistore/class/PSWebServiceLibrary.class.php
index f4ed611ac03..a91ff8e8efa 100644
--- a/htdocs/admin/dolistore/class/PSWebServiceLibrary.class.php
+++ b/htdocs/admin/dolistore/class/PSWebServiceLibrary.class.php
@@ -128,6 +128,7 @@ class PrestaShopWebservice
 			CURLOPT_HTTPHEADER => array( 'Expect:' )
 		);
 
+		dol_syslog("curl_init url=".$url);
 		$session = curl_init($url);
 
 		$curl_options = array();
@@ -142,6 +143,7 @@ class PrestaShopWebservice
 			if (!isset($curl_options[$defkey]))
 				$curl_options[$defkey] = $curl_params[$defkey];
 
+		dol_syslog("curl curl_options = ".var_export($curl_options, true));
 		curl_setopt_array($session, $curl_options);
 		$response = curl_exec($session);
 
diff --git a/htdocs/core/class/conf.class.php b/htdocs/core/class/conf.class.php
index ecbecdeee2d..12d6b337fd0 100644
--- a/htdocs/core/class/conf.class.php
+++ b/htdocs/core/class/conf.class.php
@@ -659,8 +659,8 @@ class Conf
 
 		if (! isset($this->global->MAIN_EXTRAFIELDS_IN_ONE_TD)) $this->global->MAIN_EXTRAFIELDS_IN_ONE_TD = 1;
 
-		$this->global->MAIN_MODULE_DOLISTORE_API_SRV='https://www.dolistore.com';
-		$this->global->MAIN_MODULE_DOLISTORE_API_KEY='dolistorecatalogpublickey1234567';
+		if (empty($this->global->MAIN_MODULE_DOLISTORE_API_SRV)) $this->global->MAIN_MODULE_DOLISTORE_API_SRV='https://www.dolistore.com';
+		if (empty($this->global->MAIN_MODULE_DOLISTORE_API_KEY)) $this->global->MAIN_MODULE_DOLISTORE_API_KEY='dolistorecatalogpublickey1234567';
 
 		// For backward compatibility
 		if (isset($this->product))   $this->produit=$this->product;