diff --git a/src/libcore/marker.rs b/src/libcore/marker.rs
index e8fd729b638bed4abfdd7bc2bdcd8a7e8faa274e..f56a9a40332987c804e829fa35d362416c241a53 100644
--- a/src/libcore/marker.rs
+++ b/src/libcore/marker.rs
@@ -122,7 +122,7 @@ pub trait Sized {
 /// [RFC982]: https://github.com/rust-lang/rfcs/blob/master/text/0982-dst-coercion.md
 /// [nomicon-coerce]: ../../nomicon/coercions.html
 #[unstable(feature = "unsize", issue = "27732")]
-#[lang="unsize"]
+#[lang = "unsize"]
 pub trait Unsize<T: ?Sized> {
     // Empty.
 }
diff --git a/src/libcore/ops/unsize.rs b/src/libcore/ops/unsize.rs
index 58da290cfb694bb8bbb547c09fa90d7147c6bb07..cd896859b16bc7eb703de393279305f37d8529b5 100644
--- a/src/libcore/ops/unsize.rs
+++ b/src/libcore/ops/unsize.rs
@@ -42,7 +42,7 @@
 /// [unsize]: ../marker/trait.Unsize.html
 /// [nomicon-coerce]: ../../nomicon/coercions.html
 #[unstable(feature = "coerce_unsized", issue = "27732")]
-#[lang="coerce_unsized"]
+#[lang = "coerce_unsized"]
 pub trait CoerceUnsized<T> {
     // Empty.
 }
diff --git a/src/libcore/ptr.rs b/src/libcore/ptr.rs
index 4041a3760e5ca467fa8d1a99e4ba2bd8551366c9..34d310446536d19c41317681feebfa99d87be15b 100644
--- a/src/libcore/ptr.rs
+++ b/src/libcore/ptr.rs
@@ -56,7 +56,7 @@
 /// This has all the same safety problems as `ptr::read` with respect to
 /// invalid pointers, types, and double drops.
 #[stable(feature = "drop_in_place", since = "1.8.0")]
-#[lang="drop_in_place"]
+#[lang = "drop_in_place"]
 #[allow(unconditional_recursion)]
 pub unsafe fn drop_in_place<T: ?Sized>(to_drop: *mut T) {
     // Code here does not matter - this is replaced by the
diff --git a/src/rtstartup/rsbegin.rs b/src/rtstartup/rsbegin.rs
index 335817fddbbe276c84e081f93496154e3bfa27e3..8733c7436d5bd9658280ab37bfa313d479759a5d 100644
--- a/src/rtstartup/rsbegin.rs
+++ b/src/rtstartup/rsbegin.rs
@@ -38,7 +38,7 @@ trait Copy {}
 trait Freeze {}
 impl Freeze for .. {}
 
-#[lang="drop_in_place"]
+#[lang = "drop_in_place"]
 #[inline]
 #[allow(unconditional_recursion)]
 pub unsafe fn drop_in_place<T: ?Sized>(to_drop: *mut T) {
diff --git a/src/rtstartup/rsend.rs b/src/rtstartup/rsend.rs
index 9229b4e31289f727ee80cbe94c6c9a924fbe1cc7..a6aed3540ddbb8b9d092f137a23322d7a9b49201 100644
--- a/src/rtstartup/rsend.rs
+++ b/src/rtstartup/rsend.rs
@@ -25,7 +25,7 @@ trait Copy {}
 trait Freeze {}
 impl Freeze for .. {}
 
-#[lang="drop_in_place"]
+#[lang = "drop_in_place"]
 #[inline]
 #[allow(unconditional_recursion)]
 pub unsafe fn drop_in_place<T: ?Sized>(to_drop: *mut T) {