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-rw-r--r--src/libnum/bigint.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/libnum/bigint.rs b/src/libnum/bigint.rs
index 63f48ea9d22..77989d2ea5e 100644
--- a/src/libnum/bigint.rs
+++ b/src/libnum/bigint.rs
@@ -829,7 +829,7 @@ fn get_radix_base(radix: uint) -> (uint, uint) {
 }
 
 /// A Sign is a `BigInt`'s composing element.
-#[deriving(Eq, Clone)]
+#[deriving(Eq, Clone, Show)]
 pub enum Sign { Minus, Zero, Plus }
 
 impl Ord for Sign {