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-rw-r--r--src/libcore/default.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/libcore/default.rs b/src/libcore/default.rs
index 244df1a9966..ab36e29b1e1 100644
--- a/src/libcore/default.rs
+++ b/src/libcore/default.rs
@@ -126,7 +126,7 @@ pub trait Default: Sized {
 }
 
 macro_rules! default_impl {
-    ($t:ty, $v:expr, $doc:expr) => {
+    ($t:ty, $v:expr, $doc:tt) => {
         #[stable(feature = "rust1", since = "1.0.0")]
         impl Default for $t {
             #[inline]