diff --git a/src/gt.rs b/src/gt.rs
index eb430c0..9d8bfcd 100644
--- a/src/gt.rs
+++ b/src/gt.rs
@@ -300,7 +300,6 @@ impl Group for Gt {
         self.0.ct_eq(&Self::identity().0)
     }
 
-    #[must_use]
     fn double(&self) -> Self {
         Gt(self.0.square())
     }