diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3a1a948..23d93cf 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -18,6 +18,7 @@ Procedure when bumping the version number:
 - Config file
 - `ephemeral` config option
 - `data_dir` config option
+- `euph.rooms.<name>.username` config option
 - `euph.rooms.<name>.password` config option
 
 ## v0.3.0 - 2022-08-22
diff --git a/src/config.rs b/src/config.rs
index f984e14..129df20 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -8,6 +8,7 @@ use crate::macros::ok_or_return;
 
 #[derive(Debug, Clone, Default, Deserialize)]
 pub struct EuphRoom {
+    pub username: Option<String>,
     pub password: Option<String>,
 }
 
diff --git a/src/euph/room.rs b/src/euph/room.rs
index cef9321..9fc2068 100644
--- a/src/euph/room.rs
+++ b/src/euph/room.rs
@@ -58,6 +58,7 @@ enum Event {
 #[derive(Debug)]
 struct State {
     name: String,
+    username: Option<String>,
     password: Option<String>,
     vault: EuphVault,
 
@@ -285,6 +286,17 @@ impl State {
                 self.last_msg_id = Some(d.log.last().map(|m| m.id));
                 let own_user_id = self.own_user_id().await;
                 self.vault.add_messages(d.log.clone(), None, own_user_id);
+
+                if d.nick.is_none() {
+                    // Avoid overwriting nicks that the euphoria backend already
+                    // knows, e. g. because the user set it while logged in via
+                    // the browser. This setting is mostly meant for ephemeral
+                    // mode. Maybe I'll add a "force_nick" setting at some point
+                    // in the future?
+                    if let Some(username) = &self.username {
+                        self.on_nick(username.clone());
+                    }
+                }
             }
             Data::LogReply(d) => {
                 let own_user_id = self.own_user_id().await;
@@ -421,6 +433,7 @@ pub struct Room {
 impl Room {
     pub fn new(
         vault: EuphVault,
+        username: Option<String>,
         password: Option<String>,
     ) -> (Self, mpsc::UnboundedReceiver<EuphRoomEvent>) {
         let (canary_tx, canary_rx) = oneshot::channel();
@@ -430,6 +443,7 @@ impl Room {
 
         let state = State {
             name: vault.room().to_string(),
+            username,
             password,
             vault,
             conn_tx: None,
diff --git a/src/ui/euph/room.rs b/src/ui/euph/room.rs
index 2700b1d..b125ce0 100644
--- a/src/ui/euph/room.rs
+++ b/src/ui/euph/room.rs
@@ -102,7 +102,11 @@ impl EuphRoom {
         if self.room.is_none() {
             let store = self.chat.store().clone();
             let name = store.room().to_string();
-            let (room, euph_room_event_rx) = euph::Room::new(store, self.config.password.clone());
+            let (room, euph_room_event_rx) = euph::Room::new(
+                store,
+                self.config.username.clone(),
+                self.config.password.clone(),
+            );
 
             self.room = Some(room);