--- a/media/libcubeb/cubeb-coreaudio-rs/README_MOZILLA
+++ b/media/libcubeb/cubeb-coreaudio-rs/README_MOZILLA
@@ -1,6 +1,6 @@
 The source from this directory was copied from the cubeb-coreaudio-rs
 git repository using the update.sh script.
 
 The cubeb-coreaudio-rs git repository is: https://github.com/ChunMinChang/cubeb-coreaudio-rs
 
-The git commit ID used was cd954ca94baafc1bd0c4c661f07b816e9263ed1b (2019-10-25 08:42:19 -0700)
+The git commit ID used was 0920240e4166d2b562840c8062e149d63f7c3a02 (2019-11-13 09:18:08 -0800)

--- a/media/libcubeb/cubeb-coreaudio-rs/src/backend/mod.rs
+++ b/media/libcubeb/cubeb-coreaudio-rs/src/backend/mod.rs
@@ -3465,23 +3465,30 @@ impl<'ctx> StreamOps for AudioUnitStream
         set_volume(self.core_stream_data.output_unit, volume)
     }
     #[cfg(target_os = "ios")]
     fn current_device(&mut self) -> Result<&DeviceRef> {
         Err(not_supported())
     }
     #[cfg(not(target_os = "ios"))]
     fn current_device(&mut self) -> Result<&DeviceRef> {
-        let mut device: Box<ffi::cubeb_device> = Box::new(ffi::cubeb_device::default());
-        if let Ok(source) = audiounit_get_default_datasource_string(DeviceType::INPUT) {
-            device.input_name = source.into_raw();
+        let input_name = audiounit_get_default_datasource_string(DeviceType::INPUT);
+        let output_name = audiounit_get_default_datasource_string(DeviceType::OUTPUT);
+        if input_name.is_err() && output_name.is_err() {
+            return Err(Error::error());
         }
-        if let Ok(source) = audiounit_get_default_datasource_string(DeviceType::OUTPUT) {
-            device.output_name = source.into_raw();
-        }
+
+        let mut device: Box<ffi::cubeb_device> = Box::new(ffi::cubeb_device::default());
+
+        let input_name = input_name.unwrap_or(CString::default());
+        device.input_name = input_name.into_raw();
+
+        let output_name = output_name.unwrap_or(CString::default());
+        device.output_name = output_name.into_raw();
+
         Ok(unsafe { DeviceRef::from_ptr(Box::into_raw(device)) })
     }
     #[cfg(target_os = "ios")]
     fn device_destroy(&mut self, device: &DeviceRef) -> Result<()> {
         Err(not_supported())
     }
     #[cfg(not(target_os = "ios"))]
     fn device_destroy(&mut self, device: &DeviceRef) -> Result<()> {