diff --git a/library/core/src/marker/variance.rs b/library/core/src/marker/variance.rs
index f9638fea225b7..55fdacb014e67 100644
--- a/library/core/src/marker/variance.rs
+++ b/library/core/src/marker/variance.rs
@@ -18,7 +18,7 @@ macro_rules! phantom_type {
         pub struct $name:ident <$t:ident> ($($inner:tt)*);
     )*) => {$(
         $(#[$attr])*
-        pub struct $name<$t>($($inner)*) where T: ?Sized;
+        pub struct $name<$t>($($inner)*) where $t: ?Sized;
 
         impl<T> $name<T>
             where T: ?Sized