diff --git a/libdino/src/service/module_manager.vala b/libdino/src/service/module_manager.vala
index 9a510662..9f2a05d0 100644
--- a/libdino/src/service/module_manager.vala
+++ b/libdino/src/service/module_manager.vala
@@ -32,12 +32,13 @@ public class ModuleManager {
 
     public ArrayList<Core.XmppStreamModule> get_modules(Account account, string? resource = null) {
         ArrayList<Core.XmppStreamModule> modules = new ArrayList<Core.XmppStreamModule>();
+
+        modules.add(new Bind.Module(resource == null ? account.resourcepart : resource));
+        modules.add(new PlainSasl.Module(account.bare_jid.to_string(), account.password));
         lock (module_map) {
             if (!module_map.has_key(account)) initialize(account);
             foreach (Core.XmppStreamModule module in module_map[account]) modules.add(module);
         }
-        modules.add(new Bind.Module(resource == null ? account.resourcepart : resource));
-        modules.add(new PlainSasl.Module(account.bare_jid.to_string(), account.password));
         return modules;
     }
 
@@ -45,6 +46,7 @@ public class ModuleManager {
         lock(module_map) {
             module_map[account] = new ArrayList<Core.XmppStreamModule>();
             module_map[account].add(new Tls.Module());
+            module_map[account].add(new Session.Module());
             module_map[account].add(new Roster.Module());
             module_map[account].add(new Xep.ServiceDiscovery.Module.with_identity("client", "pc"));
             module_map[account].add(new Xep.PrivateXmlStorage.Module());
@@ -66,4 +68,4 @@ public class ModuleManager {
     }
 }
 
-}
\ No newline at end of file
+}
diff --git a/xmpp-vala/CMakeLists.txt b/xmpp-vala/CMakeLists.txt
index 68c4f356..80e665e2 100644
--- a/xmpp-vala/CMakeLists.txt
+++ b/xmpp-vala/CMakeLists.txt
@@ -28,6 +28,7 @@ SOURCES
     "src/module/roster/module.vala"
     "src/module/roster/versioning_module.vala"
     "src/module/sasl.vala"
+    "src/module/session.vala"
     "src/module/stanza.vala"
     "src/module/stanza_error.vala"
     "src/module/stream_error.vala"
@@ -81,4 +82,4 @@ set_target_properties(xmpp-vala PROPERTIES VERSION 0.1 SOVERSION 0)
 
 install(TARGETS xmpp-vala ${TARGET_INSTALL})
 install(FILES ${CMAKE_BINARY_DIR}/exports/xmpp-vala.vapi ${CMAKE_BINARY_DIR}/exports/xmpp-vala.deps DESTINATION ${VAPI_INSTALL_DIR})
-install(FILES ${CMAKE_BINARY_DIR}/exports/xmpp-vala.h DESTINATION ${INCLUDE_INSTALL_DIR})
\ No newline at end of file
+install(FILES ${CMAKE_BINARY_DIR}/exports/xmpp-vala.h DESTINATION ${INCLUDE_INSTALL_DIR})
diff --git a/xmpp-vala/src/module/bind.vala b/xmpp-vala/src/module/bind.vala
index 5a611875..7b08e0f7 100644
--- a/xmpp-vala/src/module/bind.vala
+++ b/xmpp-vala/src/module/bind.vala
@@ -35,7 +35,7 @@ namespace Xmpp.Bind {
                 StanzaNode bind_node = new StanzaNode.build("bind", NS_URI).add_self_xmlns();
                 bind_node.put_node(new StanzaNode.build("resource", NS_URI).put_node(new StanzaNode.text(requested_resource)));
                 stream.get_module(Iq.Module.IDENTITY).send_iq(stream, new Iq.Stanza.set(bind_node), (stream, iq) => {
-                    stream.get_module(Bind.Module.IDENTITY).iq_response_stanza(stream, iq);
+                    stream.get_module(Module.IDENTITY).iq_response_stanza(stream, iq);
                 });
                 stream.add_flag(flag);
             }
@@ -51,7 +51,7 @@ namespace Xmpp.Bind {
         }
 
         public static void require(XmppStream stream) {
-            if (stream.get_module(IDENTITY) == null) stream.add_module(new Bind.Module(""));
+            if (stream.get_module(IDENTITY) == null) stream.add_module(new Module(""));
         }
 
         public override bool mandatory_outstanding(XmppStream stream) {
diff --git a/xmpp-vala/src/module/session.vala b/xmpp-vala/src/module/session.vala
new file mode 100644
index 00000000..f37e585f
--- /dev/null
+++ b/xmpp-vala/src/module/session.vala
@@ -0,0 +1,54 @@
+using Xmpp.Core;
+
+namespace Xmpp.Session {
+private const string NS_URI = "urn:ietf:params:xml:ns:xmpp-session";
+
+public class Module : XmppStreamNegotiationModule {
+    public static ModuleIdentity<Module> IDENTITY = new ModuleIdentity<Module>(NS_URI, "session");
+
+    public override void attach(XmppStream stream) {
+        Bind.Module.require(stream);
+        stream.get_module(Bind.Module.IDENTITY).bound_to_resource.connect(on_bound_resource);
+    }
+
+    public override void detach(XmppStream stream) {
+        stream.get_module(Bind.Module.IDENTITY).bound_to_resource.disconnect(on_bound_resource);
+    }
+
+    public static void require(XmppStream stream) {
+        if (stream.get_module(IDENTITY) == null) stream.add_module(new Module());
+    }
+
+    /* the client MUST establish a session if it desires to engage in instant messaging and presence functionality (RFC 3921 3) */
+    public override bool mandatory_outstanding(XmppStream stream) {
+        return !stream.has_flag(Flag.IDENTITY) || !stream.get_flag(Flag.IDENTITY).finished;
+    }
+
+    public override bool negotiation_active(XmppStream stream) {
+        return stream.has_flag(Flag.IDENTITY) && !stream.get_flag(Flag.IDENTITY).finished;
+    }
+
+    public override string get_ns() { return NS_URI; }
+    public override string get_id() { return IDENTITY.id; }
+
+    private void on_bound_resource(XmppStream stream, string my_jid) {
+        if (stream.features.get_subnode("session", NS_URI) != null) {
+            stream.add_flag(new Flag());
+            Iq.Stanza iq = new Iq.Stanza.set(new StanzaNode.build("session", NS_URI).add_self_xmlns()) { to=stream.remote_name };
+            stream.get_module(Iq.Module.IDENTITY).send_iq(stream, iq, (stream, iq) => {
+                if (!iq.is_error()) {
+                    stream.get_flag(Flag.IDENTITY).finished = true;
+                }
+            });
+        }
+    }
+}
+
+public class Flag : XmppStreamFlag {
+    public static FlagIdentity<Flag> IDENTITY = new FlagIdentity<Flag>(NS_URI, "session");
+    public bool finished = false;
+
+    public override string get_ns() { return NS_URI; }
+    public override string get_id() { return IDENTITY.id; }
+}
+}