--- coreapi/linphonecore.c	2013-06-06 09:13:34.498066251 +0200
+++ coreapi/linphonecore.c_new	2013-06-06 09:49:05.226003295 +0200
@@ -2314,7 +2314,8 @@
 	/*always prefer the default proxy if it is matching the destination uri*/
 	if (default_cfg){
 		const char *domain=linphone_proxy_config_get_domain(default_cfg);
-		if (strcmp(domain,linphone_address_get_domain(uri))==0)
+		const char *uri_domain=linphone_address_get_domain(uri);
+		if (uri_domain != NULL && strcmp(domain,uri_domain)==0)
 			return default_cfg;
 	}
 
@@ -2322,7 +2323,8 @@
 	for (elem=linphone_core_get_proxy_config_list(lc);elem!=NULL;elem=elem->next){
 		LinphoneProxyConfig *cfg=(LinphoneProxyConfig*)elem->data;
 		const char *domain=linphone_proxy_config_get_domain(cfg);
-		if (domain!=NULL && strcmp(domain,linphone_address_get_domain(uri))==0){
+		const char *uri_domain=linphone_address_get_domain(uri);
+		if (domain!=NULL && uri_domain!=NULL && strcmp(domain,uri_domain)==0){
 			found_cfg=cfg;
 			break;
 		}