diff --git a/src/dim.rs b/src/dim.rs
index 03cb53a..442ed72 100644
--- a/src/dim.rs
+++ b/src/dim.rs
@@ -1,6 +1,6 @@
 use core::cmp::Eq;
 
-pub trait Dimensional<T>: Eq, Index<uint, T> {
+pub trait Dimensional<T>: Index<uint, T> {
     static pure fn dim() -> uint;
     pure fn to_ptr() -> *T;
 }
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