diff --git a/src/rcore/addresses.rs b/src/rcore/addresses.rs
index e9e05b5..96adf68 100644
--- a/src/rcore/addresses.rs
+++ b/src/rcore/addresses.rs
@@ -67,7 +67,7 @@ pub trait InliningAddresses<E>: Inlining {
     }
 }
 
-impl<E, D: Inlining> InliningAddresses<E> for D {}
+impl<E, D: ?Sized + Inlining> InliningAddresses<E> for D {}
 
 fn _parse_slice<'a, Ctx: Context<'a>, A: Mentionable<'a, Ctx>>(
     factory: &A::Fctr,