diff --git a/src/error.rs b/src/error.rs
new file mode 100644
index 0000000..70d4558
--- /dev/null
+++ b/src/error.rs
@@ -0,0 +1,23 @@
+/*
+ * Copyright © 2023 Collabora Ltd.
+ * Copyright © 2024 Valve Software
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+use zbus::fdo;
+
+pub fn to_zbus_fdo_error<S: ToString>(error: S) -> fdo::Error {
+    fdo::Error::Failed(error.to_string())
+}
+
+pub fn to_zbus_error<S: ToString>(error: S) -> zbus::Error {
+    zbus::Error::Failure(error.to_string())
+}
+
+pub fn zbus_to_zbus_fdo(error: zbus::Error) -> fdo::Error {
+    match error {
+        zbus::Error::FDO(error) => *error,
+        error => fdo::Error::Failed(error.to_string()),
+    }
+}
diff --git a/src/lib.rs b/src/lib.rs
index 4ba36d9..73b5a7c 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -17,6 +17,7 @@ use tracing::{info, warn};
 mod cec;
 mod daemon;
 mod ds_inhibit;
+mod error;
 mod hardware;
 mod manager;
 mod power;
@@ -135,21 +136,6 @@ async fn reload() -> Result<()> {
     }
 }
 
-pub fn to_zbus_fdo_error<S: ToString>(error: S) -> zbus::fdo::Error {
-    zbus::fdo::Error::Failed(error.to_string())
-}
-
-pub fn to_zbus_error<S: ToString>(error: S) -> zbus::Error {
-    zbus::Error::Failure(error.to_string())
-}
-
-pub fn zbus_to_zbus_fdo(error: zbus::Error) -> zbus::fdo::Error {
-    match error {
-        zbus::Error::FDO(error) => *error,
-        error => zbus::fdo::Error::Failed(error.to_string()),
-    }
-}
-
 #[cfg(test)]
 mod test {
     use crate::testing;
diff --git a/src/manager.rs b/src/manager.rs
index 992e710..637f5bb 100644
--- a/src/manager.rs
+++ b/src/manager.rs
@@ -12,6 +12,7 @@ use tracing::error;
 use zbus::zvariant::Fd;
 use zbus::{interface, Connection, SignalContext};
 
+use crate::error::{to_zbus_error, to_zbus_fdo_error};
 use crate::hardware::{check_support, variant, FanControl, FanControlState, HardwareVariant};
 use crate::power::{
     get_gpu_clocks, get_gpu_performance_level, get_tdp_limit, set_gpu_clocks,
@@ -22,7 +23,7 @@ use crate::wifi::{
     get_wifi_backend, get_wifi_power_management_state, set_wifi_backend, set_wifi_debug_mode,
     set_wifi_power_management_state, WifiBackend, WifiDebugMode, WifiPowerManagement,
 };
-use crate::{to_zbus_error, to_zbus_fdo_error, API_VERSION};
+use crate::API_VERSION;
 
 #[derive(PartialEq, Debug, Copy, Clone)]
 #[repr(u32)]
diff --git a/src/process.rs b/src/process.rs
index d8290d7..b228742 100644
--- a/src/process.rs
+++ b/src/process.rs
@@ -17,7 +17,7 @@ use tokio::process::{Child, Command};
 use tracing::error;
 use zbus::interface;
 
-use crate::to_zbus_fdo_error;
+use crate::error::to_zbus_fdo_error;
 
 const PROCESS_PREFIX: &str = "/com/steampowered/SteamOSManager1/Process";
 
diff --git a/src/user_manager.rs b/src/user_manager.rs
index 43220eb..0d510b0 100644
--- a/src/user_manager.rs
+++ b/src/user_manager.rs
@@ -13,7 +13,8 @@ use zbus::zvariant::Fd;
 use zbus::{interface, Connection, Proxy, SignalContext};
 
 use crate::cec::{HdmiCecControl, HdmiCecState};
-use crate::{to_zbus_error, to_zbus_fdo_error, zbus_to_zbus_fdo, API_VERSION};
+use crate::error::{to_zbus_error, to_zbus_fdo_error, zbus_to_zbus_fdo};
+use crate::API_VERSION;
 
 macro_rules! method {
     ($self:expr, $method:expr, $($args:expr),+) => {