diff --git a/cubeb-core/Cargo.toml b/cubeb-core/Cargo.toml
index f7a1146..7e0e88f 100644
--- a/cubeb-core/Cargo.toml
+++ b/cubeb-core/Cargo.toml
@@ -18,7 +18,7 @@ circle-ci = { repository = "mozilla/cubeb-rs" }
 gecko-in-tree = ["cubeb-sys/gecko-in-tree"]
 
 [dependencies]
-bitflags = "1.2.0"
+bitflags = "2.9.1"
 cubeb-sys = { path = "../cubeb-sys", version = "0.29" }
 
 [build-dependencies]
diff --git a/cubeb-core/src/channel.rs b/cubeb-core/src/channel.rs
index 4a6c16f..7c9ceab 100644
--- a/cubeb-core/src/channel.rs
+++ b/cubeb-core/src/channel.rs
@@ -7,6 +7,7 @@ use ffi;
 
 bitflags! {
     /// Some common layout definitions
+    #[derive(PartialEq, Eq, PartialOrd, Ord, Hash, Debug, Clone, Copy)]
     pub struct ChannelLayout: ffi::cubeb_channel_layout {
         const FRONT_LEFT = ffi::CHANNEL_FRONT_LEFT;
         const FRONT_RIGHT = ffi::CHANNEL_FRONT_RIGHT;
diff --git a/cubeb-core/src/device.rs b/cubeb-core/src/device.rs
index 4854aa2..472f57a 100644
--- a/cubeb-core/src/device.rs
+++ b/cubeb-core/src/device.rs
@@ -20,6 +20,7 @@ pub enum DeviceState {
 
 bitflags! {
     /// Architecture specific sample type.
+    #[derive(PartialEq, Eq, PartialOrd, Ord, Hash, Debug, Clone, Copy)]
     pub struct DeviceFormat: ffi::cubeb_device_fmt {
         const S16LE = ffi::CUBEB_DEVICE_FMT_S16LE;
         const S16BE = ffi::CUBEB_DEVICE_FMT_S16BE;
@@ -32,11 +33,12 @@ bitflags! {
     /// Channel type for a `cubeb_stream`. Depending on the backend and platform
     /// used, this can control inter-stream interruption, ducking, and volume
     /// control.
+    #[derive(PartialEq, Eq, PartialOrd, Ord, Hash, Debug, Clone, Copy)]
     pub struct DevicePref: ffi::cubeb_device_pref {
         const MULTIMEDIA = ffi::CUBEB_DEVICE_PREF_MULTIMEDIA;
         const VOICE = ffi::CUBEB_DEVICE_PREF_VOICE;
         const NOTIFICATION = ffi::CUBEB_DEVICE_PREF_NOTIFICATION;
-        const ALL = ffi::CUBEB_DEVICE_PREF_ALL;
+        const _ = 0x08;
     }
 }
 
@@ -47,6 +49,7 @@ impl DevicePref {
 bitflags! {
     /// Whether a particular device is an input device (e.g. a microphone), or an
     /// output device (e.g. headphones).
+    #[derive(PartialEq, Eq, PartialOrd, Ord, Hash, Debug, Clone, Copy)]
     pub struct DeviceType: ffi::cubeb_device_type {
         const INPUT = ffi::CUBEB_DEVICE_TYPE_INPUT as _;
         const OUTPUT = ffi::CUBEB_DEVICE_TYPE_OUTPUT as _;
@@ -226,8 +229,8 @@ impl DeviceInfoRef {
 
 #[cfg(test)]
 mod tests {
-    use ffi::cubeb_device;
-    use Device;
+    use ffi::{cubeb_device, CUBEB_DEVICE_PREF_ALL};
+    use {Device, DevicePref};
 
     #[test]
     fn device_device_ref_same_ptr() {
@@ -236,4 +239,12 @@ mod tests {
         assert_eq!(device.as_ptr(), ptr);
         assert_eq!(device.as_ptr(), device.as_ref().as_ptr());
     }
+
+    #[test]
+    fn device_pref_all_same_as_the_constant() {
+        assert_eq!(
+            DevicePref::all(),
+            DevicePref::from_bits_retain(CUBEB_DEVICE_PREF_ALL)
+        );
+    }
 }
diff --git a/cubeb-core/src/stream.rs b/cubeb-core/src/stream.rs
index 403ffb3..4d7aaae 100644
--- a/cubeb-core/src/stream.rs
+++ b/cubeb-core/src/stream.rs
@@ -48,6 +48,7 @@ impl From<State> for ffi::cubeb_state {
 
 bitflags! {
     /// Miscellaneous stream preferences.
+    #[derive(PartialEq, Eq, PartialOrd, Ord, Hash, Debug, Clone, Copy)]
     pub struct StreamPrefs: ffi::cubeb_stream_prefs {
         const LOOPBACK = ffi::CUBEB_STREAM_PREF_LOOPBACK;
         const DISABLE_DEVICE_SWITCHING = ffi::CUBEB_STREAM_PREF_DISABLE_DEVICE_SWITCHING;
@@ -61,6 +62,7 @@ impl StreamPrefs {
 
 bitflags! {
     /// Input stream processing parameters.
+    #[derive(PartialEq, Eq, PartialOrd, Ord, Hash, Debug, Clone, Copy)]
     pub struct InputProcessingParams: ffi::cubeb_input_processing_params {
         const ECHO_CANCELLATION = ffi::CUBEB_INPUT_PROCESSING_PARAM_ECHO_CANCELLATION;
         const NOISE_SUPPRESSION = ffi::CUBEB_INPUT_PROCESSING_PARAM_NOISE_SUPPRESSION;