diff --git a/rslib/src/backend.rs b/rslib/src/backend.rs
index e34e93f14..76e6df462 100644
--- a/rslib/src/backend.rs
+++ b/rslib/src/backend.rs
@@ -313,7 +313,7 @@ impl Backend {
     }
 
     fn add_file_to_media_folder(&mut self, input: pt::AddFileToMediaFolderIn) -> Result<String> {
-        let mut mgr = MediaManager::new(&self.media_folder, &self.media_db)?;
+        let mgr = MediaManager::new(&self.media_folder, &self.media_db)?;
         Ok(mgr.add_file(&input.desired_name, &input.data)?.into())
     }
 
diff --git a/rslib/src/media/mod.rs b/rslib/src/media/mod.rs
index 38aa42559..a928bab21 100644
--- a/rslib/src/media/mod.rs
+++ b/rslib/src/media/mod.rs
@@ -38,7 +38,7 @@ impl MediaManager {
     /// appended to the name.
     ///
     /// Also notes the file in the media database.
-    pub fn add_file<'a>(&mut self, desired_name: &'a str, data: &[u8]) -> Result<Cow<'a, str>> {
+    pub fn add_file<'a>(&self, desired_name: &'a str, data: &[u8]) -> Result<Cow<'a, str>> {
         let pre_add_folder_mtime = mtime_as_i64(&self.media_folder)?;
 
         // add file to folder