diff --git a/src/audio.rs b/src/audio.rs
index 5609858..7aadba6 100644
--- a/src/audio.rs
+++ b/src/audio.rs
@@ -9,7 +9,7 @@ use ::tools::from_cstr;
 
 pub trait MediaPlayerAudioEx {
     fn get_mute(&self) -> Option<bool>;
-    fn set_mute(&self, bool);
+    fn set_mute(&self, muted: bool);
     fn get_volume(&self) -> i32;
     fn set_volume(&self, volume: i32) -> Result<(), ()>;
     fn get_audio_track_description(&self) -> Option<Vec<TrackDescription>>;