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-rw-r--r--src/libstd/serialization.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/libstd/serialization.rs b/src/libstd/serialization.rs
index 1b2cd0aaa3d..93d025a7786 100644
--- a/src/libstd/serialization.rs
+++ b/src/libstd/serialization.rs
@@ -376,7 +376,7 @@ pub impl<D: Deserializer, T: Deserializable<D>> Option<T>: Deserializable<D> {
                 match i {
                   0 => None,
                   1 => Some(d.read_enum_variant_arg(0u, || deserialize(d))),
-                  _ => fail(#fmt("Bad variant for option: %u", i))
+                  _ => fail(fmt!("Bad variant for option: %u", i))
                 }
             }
         }