diff --git a/src/compiletest/common.rs b/src/compiletest/common.rs
index b7c4e26c4b15..55d9f467f79e 100644
--- a/src/compiletest/common.rs
+++ b/src/compiletest/common.rs
@@ -10,7 +10,7 @@
 
 use core::prelude::*;
 
-#[deriving_eq]
+#[deriving(Eq)]
 pub enum mode {
     mode_compile_fail,
     mode_run_fail,