diff --git a/src/buf/chain.rs b/src/buf/chain.rs
index c026981ea2e4e11b9ca3328a3ffd6c326b5987a9..7dd44ab0219a96d8fffd871d442a27efef79a4d3 100644
--- a/src/buf/chain.rs
+++ b/src/buf/chain.rs
@@ -26,6 +26,7 @@ use iovec::IoVec;
 /// [`Buf::chain`]: trait.Buf.html#method.chain
 /// [`Buf`]: trait.Buf.html
 /// [`BufMut`]: trait.BufMut.html
+#[derive(Debug)]
 pub struct Chain<T, U> {
     a: T,
     b: U,
diff --git a/src/buf/iter.rs b/src/buf/iter.rs
index d9cf41fa77147c58923cdb61b82813ce701569be..c4d47e92093507bc04b312b3bc2bb73f43801c20 100644
--- a/src/buf/iter.rs
+++ b/src/buf/iter.rs
@@ -22,6 +22,7 @@ use Buf;
 ///
 /// [`iter`]: trait.Buf.html#method.iter
 /// [`Buf`]: trait.Buf.html
+#[derive(Debug)]
 pub struct Iter<T> {
     inner: T,
 }
diff --git a/src/buf/reader.rs b/src/buf/reader.rs
index c935753363cf14d46edbb431a9d01f64f1e1c579..59f9c3304908cd5efe270db44e58670fa99ecf10 100644
--- a/src/buf/reader.rs
+++ b/src/buf/reader.rs
@@ -7,6 +7,7 @@ use std::{cmp, io};
 /// This struct is generally created by calling `reader()` on `Buf`. See
 /// documentation of [`reader()`](trait.Buf.html#method.reader) for more
 /// details.
+#[derive(Debug)]
 pub struct Reader<B> {
     buf: B,
 }
diff --git a/src/buf/take.rs b/src/buf/take.rs
index 7e409597bf5deba24e3a3e7a6f592834dda55d93..53c2933e9b1477754d0f242325c5c610fa11ce33 100644
--- a/src/buf/take.rs
+++ b/src/buf/take.rs
@@ -6,6 +6,7 @@ use std::cmp;
 ///
 /// This struct is generally created by calling `take()` on `Buf`. See
 /// documentation of [`take()`](trait.Buf.html#method.take) for more details.
+#[derive(Debug)]
 pub struct Take<T> {
     inner: T,
     limit: usize,
diff --git a/src/buf/writer.rs b/src/buf/writer.rs
index ed0d431fad1ef550774441a537966b6790e94bd3..38a739aa662dae8b8b94498450671520ef68058a 100644
--- a/src/buf/writer.rs
+++ b/src/buf/writer.rs
@@ -7,6 +7,7 @@ use std::{cmp, io};
 /// This struct is generally created by calling `writer()` on `BufMut`. See
 /// documentation of [`writer()`](trait.BufMut.html#method.writer) for more
 /// details.
+#[derive(Debug)]
 pub struct Writer<B> {
     buf: B,
 }
diff --git a/src/lib.rs b/src/lib.rs
index d62db78f97b2d1946ed1350d5a137c13c2fb7453..13f17c5dc79a6365dca35f15d370d5f122f55d6c 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -68,7 +68,7 @@
 //! perform a syscall, which has the potential of failing. Operations on `Buf`
 //! and `BufMut` are infallible.
 
-#![deny(warnings, missing_docs)]
+#![deny(warnings, missing_docs, missing_debug_implementations)]
 #![doc(html_root_url = "https://docs.rs/bytes/0.4")]
 
 extern crate byteorder;