diff --git a/src/model/song.rs b/src/model/song.rs
index 7109ad8..fa83a8c 100644
--- a/src/model/song.rs
+++ b/src/model/song.rs
@@ -96,7 +96,6 @@ impl Song {
         if thumbnail_loading.is_none() {
             let id = self.id();
             let song_weak = self.downgrade();
-            let scale_factor = scale_factor; // NOTE: assumed constant
             *thumbnail_loading = Some(glib::spawn_future_local(async move {
                 let _permit = SEM.acquire().await.unwrap();
 
diff --git a/src/mpv/format.rs b/src/mpv/format.rs
index b37813c..f1e5f02 100644
--- a/src/mpv/format.rs
+++ b/src/mpv/format.rs
@@ -29,7 +29,7 @@ impl SetProperty for String {
     }
 }
 
-impl<'a> SetProperty for &'a str {
+impl SetProperty for &str {
     unsafe fn set_property(
         self,
         ctx: *mut ffi::mpv_handle,