diff --git a/Cargo.lock b/Cargo.lock
index 69c4337..cd81860 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -761,6 +761,7 @@ dependencies = [
  "hyper 1.0.0-rc.3",
  "lazy_static",
  "nom",
+ "nonempty",
  "prometheus",
  "quick-xml",
  "regex",
@@ -887,6 +888,12 @@ dependencies = [
  "minimal-lexical",
 ]
 
+[[package]]
+name = "nonempty"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "aeaf4ad7403de93e699c191202f017118df734d3850b01e13a3a8b2e6953d3c9"
+
 [[package]]
 name = "nu-ansi-term"
 version = "0.46.0"
diff --git a/Cargo.toml b/Cargo.toml
index ddabb38..d7f28fc 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -19,6 +19,7 @@ prometheus = { version = "0.13.3", default-features = false }
 regex = "1.7.1"
 lazy_static = "1.4.0"
 nom = "7.1.3"
+nonempty = "0.8.1"
 tokio-rustls = "0.24.1"
 rustls-pemfile = "1.0.2"
 quick-xml = { version = "0.30.0", features = ["async-tokio"] }
diff --git a/src/core/player.rs b/src/core/player.rs
index 3457a88..cb3d319 100644
--- a/src/core/player.rs
+++ b/src/core/player.rs
@@ -27,7 +27,7 @@ use crate::{
 
 /// Opaque player identifier. Cannot contain spaces, must be shorter than 32.
 #[derive(Debug, Clone, PartialEq, Eq, Hash, Serialize)]
-pub struct PlayerId(Str);
+pub struct PlayerId(pub Str);
 impl PlayerId {
     pub fn from(str: impl Into<Str>) -> Result<PlayerId> {
         let bytes = str.into();
@@ -46,6 +46,22 @@ impl PlayerId {
         self.0
     }
 }
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub struct Prefix(pub Str);
+
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub struct PrefixedNick {
+    pub prefix: Prefix,
+    pub nick: PlayerId,
+}
+impl PrefixedNick {
+    pub fn fromPlayerId(id: PlayerId) -> Result<PrefixedNick> {
+        Ok(PrefixedNick { prefix: Prefix(Str::from("")), nick: id } )
+    }
+    pub fn fromStr(nick: Str) -> Result<PrefixedNick> {
+        Ok(PrefixedNick { prefix: Prefix(Str::from("")), nick: PlayerId(nick) } )
+    }
+}
 
 #[derive(Debug, Clone, PartialEq, Eq, Hash)]
 pub struct ConnectionId(pub AnonKey);
diff --git a/src/projections/irc/mod.rs b/src/projections/irc/mod.rs
index fc490fd..37fcd42 100644
--- a/src/projections/irc/mod.rs
+++ b/src/projections/irc/mod.rs
@@ -2,6 +2,8 @@ use std::collections::HashMap;
 use std::net::SocketAddr;
 
 use futures_util::future::join_all;
+use nonempty::nonempty;
+use nonempty::NonEmpty;
 use prometheus::{IntCounter, IntGauge, Registry as MetricsRegistry};
 use serde::Deserialize;
 use tokio::io::{AsyncBufReadExt, AsyncWrite, AsyncWriteExt, BufReader, BufWriter};
@@ -666,22 +668,16 @@ async fn produce_on_join_cmd_messages(
     }
     .write_async(writer)
     .await?;
-    let mut members: String = if let Some(head) = room_info.members.first() {
-        head.as_inner().clone()
-    } else {
-        user.nickname.clone()
-    }.as_ref().into();
-    for i in &room_info.members[1..] {
-        members.push(' ');
-        members.push_str(i.as_inner());
-    }
+    let prefixedMembers: Vec<PrefixedNick> = room_info.members.iter().map(|member| PrefixedNick::fromPlayerId(member.clone()).unwrap()).collect();
+    let nonEmptyMembers: NonEmpty<PrefixedNick> = NonEmpty::from_vec(prefixedMembers).unwrap_or(nonempty![PrefixedNick::fromStr(user.nickname.clone()).unwrap()]);
+
     ServerMessage {
         tags: vec![],
         sender: Some(config.server_name.clone()),
         body: ServerMessageBody::N353NamesReply {
             client: user.nickname.clone(),
             chan: chan.clone(),
-            members: members.into(),
+            members: nonEmptyMembers.into(),
         },
     }
     .write_async(writer)
diff --git a/src/protos/irc/server.rs b/src/protos/irc/server.rs
index b2efcd4..47ca9ac 100644
--- a/src/protos/irc/server.rs
+++ b/src/protos/irc/server.rs
@@ -1,7 +1,9 @@
+use nonempty::NonEmpty;
 use tokio::io::AsyncWrite;
 use tokio::io::AsyncWriteExt;
 
 use super::*;
+use crate::core::player::PrefixedNick;
 
 /// Server-to-client message.
 #[derive(Clone, Debug, PartialEq, Eq)]
@@ -121,7 +123,7 @@ pub enum ServerMessageBody {
     N353NamesReply {
         client: Str,
         chan: Chan,
-        members: Str, // TODO make this a non-empty list with prefixes
+        members: NonEmpty<PrefixedNick>,
     },
     N366NamesReplyEnd {
         client: Str,
@@ -279,12 +281,20 @@ impl ServerMessageBody {
                 chan,
                 members,
             } => {
+                let mut membersTail: Vec<PrefixedNick> = members.tail.clone();
+                membersTail.insert(0, members.clone().head);
+
+                let membersStr: Vec<String> = membersTail.iter().map(| prefixedNick| {
+                    let pref: String = prefixedNick.prefix.0.clone().to_string();
+                    let nick: String = prefixedNick.nick.0.clone().to_string();
+                    pref + &nick
+                }).collect();
                 writer.write_all(b"353 ").await?;
                 writer.write_all(client.as_bytes()).await?;
                 writer.write_all(b" = ").await?;
                 chan.write_async(writer).await?;
                 writer.write_all(b" :").await?;
-                writer.write_all(members.as_bytes()).await?;
+                writer.write_all(membersStr.join(", ").as_bytes()).await?;
             }
             ServerMessageBody::N366NamesReplyEnd { client, chan } => {
                 writer.write_all(b"366 ").await?;