diff --git a/src/libterm/lib.rs b/src/libterm/lib.rs
index a012f4e776fb..6b115770237e 100644
--- a/src/libterm/lib.rs
+++ b/src/libterm/lib.rs
@@ -45,6 +45,7 @@
        html_root_url = "https://doc.rust-lang.org/nightly/",
        html_playground_url = "https://play.rust-lang.org/",
        test(attr(deny(warnings))))]
+#![deny(bare_trait_objects)]
 #![deny(missing_docs)]
 
 #![cfg_attr(windows, feature(libc))]
@@ -66,9 +67,9 @@ pub mod terminfo;
 mod win;
 
 /// Alias for stdout terminals.
-pub type StdoutTerminal = Terminal<Output = Stdout> + Send;
+pub type StdoutTerminal = dyn Terminal<Output = Stdout> + Send;
 /// Alias for stderr terminals.
-pub type StderrTerminal = Terminal<Output = Stderr> + Send;
+pub type StderrTerminal = dyn Terminal<Output = Stderr> + Send;
 
 #[cfg(not(windows))]
 /// Return a Terminal wrapping stdout, or None if a terminal couldn't be
diff --git a/src/libterm/terminfo/mod.rs b/src/libterm/terminfo/mod.rs
index c5e68eed4072..51e0fa315f43 100644
--- a/src/libterm/terminfo/mod.rs
+++ b/src/libterm/terminfo/mod.rs
@@ -58,7 +58,7 @@ impl error::Error for Error {
         "failed to create TermInfo"
     }
 
-    fn cause(&self) -> Option<&error::Error> {
+    fn cause(&self) -> Option<&dyn error::Error> {
         use self::Error::*;
         match self {
             &IoError(ref e) => Some(e),
diff --git a/src/libterm/terminfo/parser/compiled.rs b/src/libterm/terminfo/parser/compiled.rs
index 0cdea64db8bc..d5e5df547334 100644
--- a/src/libterm/terminfo/parser/compiled.rs
+++ b/src/libterm/terminfo/parser/compiled.rs
@@ -164,7 +164,7 @@ pub static stringnames: &'static[&'static str] = &[ "cbt", "_", "cr", "csr", "tb
     "OTG3", "OTG1", "OTG4", "OTGR", "OTGL", "OTGU", "OTGD", "OTGH", "OTGV", "OTGC", "meml", "memu",
     "box1"];
 
-fn read_le_u16(r: &mut io::Read) -> io::Result<u16> {
+fn read_le_u16(r: &mut dyn io::Read) -> io::Result<u16> {
     let mut b = [0; 2];
     let mut amt = 0;
     while amt < b.len() {
@@ -176,7 +176,7 @@ fn read_le_u16(r: &mut io::Read) -> io::Result<u16> {
     Ok((b[0] as u16) | ((b[1] as u16) << 8))
 }
 
-fn read_byte(r: &mut io::Read) -> io::Result<u8> {
+fn read_byte(r: &mut dyn io::Read) -> io::Result<u8> {
     match r.bytes().next() {
         Some(s) => s,
         None => Err(io::Error::new(io::ErrorKind::Other, "end of file")),
@@ -185,7 +185,7 @@ fn read_byte(r: &mut io::Read) -> io::Result<u8> {
 
 /// Parse a compiled terminfo entry, using long capability names if `longnames`
 /// is true
-pub fn parse(file: &mut io::Read, longnames: bool) -> Result<TermInfo, String> {
+pub fn parse(file: &mut dyn io::Read, longnames: bool) -> Result<TermInfo, String> {
     macro_rules! t( ($e:expr) => (
         match $e {
             Ok(e) => e,