diff --git a/src/error.rs b/src/error.rs
index 9e904a3..1f52424 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -58,7 +58,7 @@ impl StdError for ErrorKind {
         }
     }
 
-    fn cause(&self) -> Option<&dyn error::Error> {
+    fn cause(&self) -> Option<&error::Error> {
         match *self {
             ErrorKind::Io(ref err) => Some(err),
             ErrorKind::InvalidUtf8Encoding(_) => None,