diff --git a/src/future/client.rs b/src/future/client.rs
index 56624fb..db30ba8 100644
--- a/src/future/client.rs
+++ b/src/future/client.rs
@@ -90,10 +90,10 @@ enum Reactor {
 
 impl fmt::Debug for Reactor {
     fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
-        const HANDLE: &'static &'static str = &"Reactor::Handle";
-        const HANDLE_INNER: &'static &'static str = &"Handle { .. }";
-        const REMOTE: &'static &'static str = &"Reactor::Remote";
-        const REMOTE_INNER: &'static &'static str = &"Remote { .. }";
+        const HANDLE: &'static &str = &"Reactor::Handle";
+        const HANDLE_INNER: &'static &str = &"Handle { .. }";
+        const REMOTE: &'static &str = &"Reactor::Remote";
+        const REMOTE_INNER: &'static &str = &"Remote { .. }";
 
         match *self {
             Reactor::Handle(_) => f.debug_tuple(HANDLE).field(HANDLE_INNER).finish(),
diff --git a/src/future/server/mod.rs b/src/future/server/mod.rs
index 4864c65..7637e18 100644
--- a/src/future/server/mod.rs
+++ b/src/future/server/mod.rs
@@ -127,7 +127,7 @@ impl fmt::Debug for Acceptor {
     fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
         use self::Acceptor::*;
         #[cfg(feature = "tls")]
-        const TLS: &'static &'static str = &"TlsAcceptor { .. }";
+        const TLS: &'static &str = &"TlsAcceptor { .. }";
 
         match *self {
             Tcp => fmt.debug_tuple("Acceptor::Tcp").finish(),
@@ -223,9 +223,9 @@ impl Options {
 impl fmt::Debug for Options {
     fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
         #[cfg(feature = "tls")]
-        const SOME: &'static &'static str = &"Some(_)";
+        const SOME: &'static &str = &"Some(_)";
         #[cfg(feature = "tls")]
-        const NONE: &'static &'static str = &"None";
+        const NONE: &'static &str = &"None";
 
         let mut debug_struct = fmt.debug_struct("Options");
         #[cfg(feature = "tls")]
@@ -352,7 +352,7 @@ where
     St: fmt::Debug,
 {
     fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
-        const HANDLE: &'static &'static str = &"Handle { .. }";
+        const HANDLE: &'static &str = &"Handle { .. }";
         f.debug_struct("BindStream")
             .field("handle", HANDLE)
             .field("new_service", &self.new_service)
diff --git a/src/sync/client.rs b/src/sync/client.rs
index c42f365..7be2194 100644
--- a/src/sync/client.rs
+++ b/src/sync/client.rs
@@ -30,7 +30,7 @@ impl<Req, Resp, E> Clone for Client<Req, Resp, E> {
 
 impl<Req, Resp, E> fmt::Debug for Client<Req, Resp, E> {
     fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
-        const PROXY: &'static &'static str = &"ClientProxy { .. }";
+        const PROXY: &'static &str = &"ClientProxy { .. }";
         f.debug_struct("Client").field("proxy", PROXY).finish()
     }
 }
@@ -93,9 +93,9 @@ impl Options {
 impl fmt::Debug for Options {
     fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
         #[cfg(feature = "tls")]
-        const SOME: &'static &'static str = &"Some(_)";
+        const SOME: &'static &str = &"Some(_)";
         #[cfg(feature = "tls")]
-        const NONE: &'static &'static str = &"None";
+        const NONE: &'static &str = &"None";
         let mut f = f.debug_struct("Options");
         #[cfg(feature = "tls")] f.field("tls_ctx", if self.tls_ctx.is_some() { SOME } else { NONE });
         f.finish()
diff --git a/src/sync/server.rs b/src/sync/server.rs
index 7267882..f440cb7 100644
--- a/src/sync/server.rs
+++ b/src/sync/server.rs
@@ -89,8 +89,8 @@ impl Handle {
 
 impl fmt::Debug for Handle {
     fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
-        const CORE: &'static &'static str = &"Core { .. }";
-        const SERVER: &'static &'static str = &"Box<Future<Item = (), Error = ()>>";
+        const CORE: &'static &str = &"Core { .. }";
+        const SERVER: &'static &str = &"Box<Future<Item = (), Error = ()>>";
 
         f.debug_struct("Handle")
             .field("reactor", CORE)