diff --git a/lib/plugins/server/session.js b/lib/plugins/server/session.js
index fa8aedf5..a6636d22 100644
--- a/lib/plugins/server/session.js
+++ b/lib/plugins/server/session.js
@@ -120,9 +120,12 @@ var LowLevelPingLoop = {};
         throw("Error: the connexion with the server seems to be lost. Please reload");
     }
 
+    // Domain used for AJAX request
+    var domain_url = "";
+
     function internal_ajax(settings){
         if(linked_with_server){
-            settings.url = internal_url + settings.url;
+            settings.url = domain_url + internal_url + settings.url;
             if(to_register.length != 0){
                 var body = settings.data;
                 if (typeof body == 'undefined') body="";
@@ -564,6 +567,10 @@ var LowLevelPingLoop = {};
         }
     }
 
+    LowLevelSession.set_domain_url = function(d) {
+	domain_url = d;
+    }
+
     LowLevelSession.llmake = function(st, unserialize, fun_session,
                                       ctx, dfun, more, concurrent) {
         the_ping_loop();
@@ -747,6 +754,14 @@ function set_uu(x0, x1) {
     return js_void;
 }
 
+/**
+ * @register {string -> void}
+ */
+function set_domain_url(d) {
+    LowLevelSession.set_domain_url(d);
+    return js_void;
+}
+
 /**
  * @register {'st, \
               (opa[option('ctx)], RPC.Json.private.native, \
diff --git a/lib/stdlib/core/rpc/core/session.opa b/lib/stdlib/core/rpc/core/session.opa
index afc78d53..8e42465f 100644
--- a/lib/stdlib/core/rpc/core/session.opa
+++ b/lib/stdlib/core/rpc/core/session.opa
@@ -184,6 +184,11 @@ type make_at_response = option(RPC.Json.json)
 
 Session = {{
 
+    /**
+     * Explicitely set the domain's URL used by AJAX request, no domain by default
+     */
+    @client set_domain_url = %%Session.set_domain_url%%
+
     /**
      * {2 Creating sessions}
      */