diff --git a/src/error.rs b/src/error.rs
new file mode 100644
index 0000000..9aaf764
--- /dev/null
+++ b/src/error.rs
@@ -0,0 +1,45 @@
+// Copyright (C) 2022-2099 The crate authors.
+//
+// This program is free software: you can redistribute it and/or modify it
+// under the terms of the GNU Affero General Public License as published by the
+// Free Software Foundation, either version 3 of the License, or (at your
+// option) any later version.
+//
+// This program is distributed in the hope that it will be useful, but WITHOUT
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License
+// for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+use std::error::Error as StdError;
+use std::fmt;
+
+use tokio_xmpp::Error as TokioXMPPError;
+use xmpp_parsers::Jid;
+
+#[derive(Debug)]
+pub(crate) enum Error {
+    MismatchJids(Jid),
+    NickAlreadyAssigned(String),
+    XMPPError(TokioXMPPError),
+}
+
+impl StdError for Error {}
+
+impl fmt::Display for Error {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            Error::MismatchJids(err) => write!(f, "Mismatch Jids: {}", err),
+            Error::NickAlreadyAssigned(err) => write!(f, "Nickname already assigned: {}", err),
+            Error::XMPPError(err) => write!(f, "XMPP error: {}", err),
+        }
+    }
+}
+
+impl From<TokioXMPPError> for Error {
+    fn from(err: TokioXMPPError) -> Error {
+        Error::XMPPError(err)
+    }
+}
diff --git a/src/main.rs b/src/main.rs
index 698fe58..a7bf5a5 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -15,11 +15,13 @@
 
 #![feature(once_cell)]
 
+mod error;
+
+use crate::error::Error;
+
 use std::collections::HashMap;
 use std::convert::TryFrom;
 use std::env::args;
-use std::error::Error as StdError;
-use std::fmt;
 use std::iter::IntoIterator;
 use std::ops::ControlFlow;
 use std::process::exit;
@@ -28,7 +30,7 @@ use std::sync::{LazyLock, Mutex};
 use env_logger;
 use futures::stream::StreamExt;
 use log::{debug, error, info};
-use tokio_xmpp::{Component, Error as TokioXMPPError};
+use tokio_xmpp::Component;
 use xmpp_parsers::{
     disco::{DiscoInfoQuery, DiscoInfoResult, Feature, Identity},
     iq::{Iq, IqType},
@@ -43,31 +45,6 @@ use xmpp_parsers::{
     BareJid, Element, FullJid, Jid,
 };
 
-#[derive(Debug)]
-enum Error {
-    MismatchJids(Jid),
-    NickAlreadyAssigned(String),
-    XMPPError(TokioXMPPError),
-}
-
-impl StdError for Error {}
-
-impl fmt::Display for Error {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        match self {
-            Error::MismatchJids(err) => write!(f, "Mismatch Jids: {}", err),
-            Error::NickAlreadyAssigned(err) => write!(f, "Nickname already assigned: {}", err),
-            Error::XMPPError(err) => write!(f, "XMPP error: {}", err),
-        }
-    }
-}
-
-impl From<TokioXMPPError> for Error {
-    fn from(err: TokioXMPPError) -> Error {
-        Error::XMPPError(err)
-    }
-}
-
 async fn send_stanza<E: Into<Element>>(component: &mut Component, el: E) -> Result<(), Error> {
     let el: Element = el.into();
     debug!("SEND: {}", String::from(&el));