diff --git a/tokio-codec/src/lib.rs b/tokio-codec/src/lib.rs
index d8abd5cee..0db815023 100644
--- a/tokio-codec/src/lib.rs
+++ b/tokio-codec/src/lib.rs
@@ -32,4 +32,4 @@ pub use crate::encoder::Encoder;
 pub use crate::framed::{Framed, FramedParts};
 pub use crate::framed_read::FramedRead;
 pub use crate::framed_write::FramedWrite;
-pub use crate::lines_codec::LinesCodec;
+pub use crate::lines_codec::{LinesCodec, LinesCodecError};
diff --git a/tokio-codec/src/lines_codec.rs b/tokio-codec/src/lines_codec.rs
index 5ebfec004..4f7b08e75 100644
--- a/tokio-codec/src/lines_codec.rs
+++ b/tokio-codec/src/lines_codec.rs
@@ -190,9 +190,12 @@ impl Encoder for LinesCodec {
     }
 }
 
+/// An error occured while encoding or decoding a line.
 #[derive(Debug)]
 pub enum LinesCodecError {
+    /// The maximum line length was exceeded.
     MaxLineLengthExceeded,
+    /// An IO error occured.
     Io(io::Error),
 }
 
diff --git a/tokio/src/codec/mod.rs b/tokio/src/codec/mod.rs
index 19ba7fe42..30109bf36 100644
--- a/tokio/src/codec/mod.rs
+++ b/tokio/src/codec/mod.rs
@@ -15,4 +15,5 @@ pub mod length_delimited;
 pub use self::length_delimited::LengthDelimitedCodec;
 pub use tokio_codec::{
     BytesCodec, Decoder, Encoder, Framed, FramedParts, FramedRead, FramedWrite, LinesCodec,
+    LinesCodecError,
 };