diff --git a/src/plugin.rs b/src/plugin.rs
index b41ab2cf..6053b6cb 100644
--- a/src/plugin.rs
+++ b/src/plugin.rs
@@ -8,6 +8,8 @@ use std::collections::HashMap;
 
 use std::sync::{RwLock, Arc};
 
+use std::sync::atomic::{AtomicUsize, Ordering, ATOMIC_USIZE_INIT};
+
 use std::marker::PhantomData;
 
 use std::ops::Deref;
@@ -73,6 +75,7 @@ pub struct PluginProxyBinding {
     dispatcher: Arc<Dispatcher>,
     plugin_container: Arc<PluginContainer>,
     jid: Jid,
+    next_id: Arc<AtomicUsize>,
 }
 
 impl PluginProxyBinding {
@@ -81,6 +84,7 @@ impl PluginProxyBinding {
             dispatcher: dispatcher,
             plugin_container: plugin_container,
             jid: jid,
+            next_id: Arc::new(ATOMIC_USIZE_INIT),
         }
     }
 }
@@ -152,6 +156,13 @@ impl PluginProxy {
             binding.jid.clone()
         })
     }
+
+    /// Get a new id.
+    pub fn gen_id(&self) -> String {
+        self.with_binding(|binding| {
+            format!("{}", binding.next_id.fetch_add(1, Ordering::SeqCst))
+        })
+    }
 }
 
 /// A trait whch all plugins should implement.
diff --git a/src/plugins/messaging.rs b/src/plugins/messaging.rs
index aa8001f7..dd206516 100644
--- a/src/plugins/messaging.rs
+++ b/src/plugins/messaging.rs
@@ -67,8 +67,7 @@ impl MessagingPlugin {
             from: None,
             to: Some(to.clone()),
             type_: MessageType::Chat,
-            // TODO: always use an id.
-            id: None,
+            id: Some(self.proxy.gen_id()),
             bodies: {
                 let mut bodies = BTreeMap::new();
                 bodies.insert(String::new(), String::from(body));
diff --git a/src/plugins/ping.rs b/src/plugins/ping.rs
index dbf21fda..aeca7a21 100644
--- a/src/plugins/ping.rs
+++ b/src/plugins/ping.rs
@@ -53,8 +53,7 @@ impl PingPlugin {
         self.proxy.send(Iq {
             from: None,
             to: Some(to),
-            // TODO: use a generic way to generate ids.
-            id: Some(String::from("id")),
+            id: Some(self.proxy.gen_id()),
             payload: IqType::Get(IqPayload::Ping(Ping).into()),
         }.into());
         Ok(())
diff --git a/src/plugins/presence.rs b/src/plugins/presence.rs
index 344dd1f6..42ee94c1 100644
--- a/src/plugins/presence.rs
+++ b/src/plugins/presence.rs
@@ -20,7 +20,7 @@ impl PresencePlugin {
         let presence = Presence {
             from: None,
             to: None,
-            id: None,
+            id: Some(self.proxy.gen_id()),
             type_: type_,
             show: show,
             priority: 0i8,