2 files changed, 7 insertions, 2 deletions
diff --git a/src/libs/intertrait/mod.rs b/src/libs/intertrait/mod.rs
index 2d62871..bdae4c7 100644
--- a/src/libs/intertrait/mod.rs
+++ b/src/libs/intertrait/mod.rs
@@ -23,7 +23,7 @@
 //! MIT license (LICENSE-MIT or <http://opensource.org/licenses/MIT>)
 //!
 //! at your option.
-use std::any::{Any, TypeId};
+use std::any::{type_name, Any, TypeId};
 use std::rc::Rc;
 use std::sync::Arc;
 
@@ -60,7 +60,10 @@ static CASTER_MAP: Lazy<AHashMap<(TypeId, TypeId), BoxedCaster>> = Lazy::new(||
 
 fn cast_arc_panic<Trait: ?Sized + 'static>(_: Arc<dyn Any + Sync + Send>) -> Arc<Trait>
 {
-    panic!("Prepend [sync] to the list of target traits for Sync + Send types")
+    panic!(
+        "Interface trait '{}' has not been marked async",
+        type_name::<Trait>()
+    )
 }
 
 /// A `Caster` knows how to cast a reference to or `Box` of a trait object for `Any`
diff --git a/src/libs/mod.rs b/src/libs/mod.rs
index 8d5583d..b1c7a74 100644
--- a/src/libs/mod.rs
+++ b/src/libs/mod.rs
@@ -1,3 +1,5 @@
 pub mod intertrait;
 
+#[cfg(feature = "async")]
+pub extern crate async_trait;
 pub extern crate linkme;