diff --git a/src/wavereader.rs b/src/wavereader.rs
index e012ea3..5b42fb7 100644
--- a/src/wavereader.rs
+++ b/src/wavereader.rs
@@ -103,7 +103,7 @@ impl<R: Read + Seek> WaveReader<R> {
     /**
      * Create an `AudioFrameReader` for reading each audio frame.
     */
-    pub fn audio_frame_reader(&mut self) -> Result<AudioFrameReader<impl RRead>>, ParserError> {
+    pub fn audio_frame_reader(&mut self) -> Result<AudioFrameReader<RawChunkReader<R>>, ParserError> {
         let format = self.format()?;
         let audio_chunk_reader = self.chunk_reader(DATA_SIG, 0)?;
         Ok(AudioFrameReader::new(audio_chunk_reader, format))