diff --git a/src/bytes_mut.rs b/src/bytes_mut.rs
index a49ae76..4bfe0ff 100644
--- a/src/bytes_mut.rs
+++ b/src/bytes_mut.rs
@@ -1026,6 +1026,7 @@ impl Deref for BytesMut {
 }
 
 impl AsMut<[u8]> for BytesMut {
+    #[inline]
     fn as_mut(&mut self) -> &mut [u8] {
         self.as_slice_mut()
     }