diff --git a/src/io/cpal.rs b/src/io/cpal.rs
index 9f99e600..35e90d1c 100644
--- a/src/io/cpal.rs
+++ b/src/io/cpal.rs
@@ -420,7 +420,7 @@ impl AudioBackendManager for CpalBackend {
 
             loop {
                 let device_id = crate::media_devices::DeviceId::as_string(
-                    kind as u8,
+                    kind,
                     "cpal".to_string(),
                     device.name().unwrap(),
                     num_channels,
diff --git a/src/io/cubeb.rs b/src/io/cubeb.rs
index 0f17c331..370559a0 100644
--- a/src/io/cubeb.rs
+++ b/src/io/cubeb.rs
@@ -411,7 +411,7 @@ impl AudioBackendManager for CubebBackend {
 
             loop {
                 let device_id = crate::media_devices::DeviceId::as_string(
-                    kind as u8,
+                    kind,
                     "cubeb".to_string(),
                     device.friendly_name().unwrap().into(),
                     device.max_channels().try_into().unwrap(),
diff --git a/src/media_devices/mod.rs b/src/media_devices/mod.rs
index 4641110d..0ce54326 100644
--- a/src/media_devices/mod.rs
+++ b/src/media_devices/mod.rs
@@ -31,7 +31,7 @@ pub fn enumerate_devices_sync() -> Vec<MediaDeviceInfo> {
 // cf. https://github.com/orottier/web-audio-api-rs/issues/356
 #[derive(Hash)]
 pub(crate) struct DeviceId {
-    kind: u8,
+    kind: MediaDeviceInfoKind,
     host: String,
     device_name: String,
     num_channels: u16,
@@ -40,7 +40,7 @@ pub(crate) struct DeviceId {
 
 impl DeviceId {
     pub(crate) fn as_string(
-        kind: u8,
+        kind: MediaDeviceInfoKind,
         host: String,
         device_name: String,
         num_channels: u16,
@@ -61,7 +61,7 @@ impl DeviceId {
 }
 
 /// Describes input/output type of a media device
-#[derive(Copy, Clone, Debug, PartialEq, Eq)]
+#[derive(Copy, Clone, Debug, PartialEq, Eq, Hash)]
 pub enum MediaDeviceInfoKind {
     VideoInput,
     AudioInput,