diff --git a/src/rcore/origin.rs b/src/rcore/origin.rs
index f389902..6402c9e 100644
--- a/src/rcore/origin.rs
+++ b/src/rcore/origin.rs
@@ -3,13 +3,14 @@ use super::*;
 /// Represents a potentially resolvable [`Mentionable`].
 pub trait Origin<'a, Ctx: Context<'a>>: 'a {
     /// Type of the associated object.
-    type Mtbl: MentionableBase<'a, Ctx> + MentionableTop<'a, Ctx>;
+    type Mtbl: MentionableBase<'a, Ctx>;
     /// Clone the associated factory.
     fn factory(&self) -> OFctr<'a, Ctx, Self>;
     /// Try resolving the value.
     fn resolve(self: Rc<Self>) -> Resolution<'a, Ctx, Self::Mtbl>
     where
-        OFctr<'a, Ctx, Self>: Factory<'a, Ctx>;
+        OFctr<'a, Ctx, Self>: Factory<'a, Ctx>,
+        Self::Mtbl: MentionableTop<'a, Ctx>;
     /// Try resolving the bytes. Should avoid parsing the value.
     fn resolve_bytes(self: Rc<Self>) -> HashResolution<'a, Ctx>;
 }
diff --git a/src/rstd/wrapped_origin.rs b/src/rstd/wrapped_origin.rs
index 5f7ac83..72ceca2 100644
--- a/src/rstd/wrapped_origin.rs
+++ b/src/rstd/wrapped_origin.rs
@@ -27,6 +27,7 @@ pub trait MappableOrigin<'a, Ctx: Context<'a>>: Origin<'a, Ctx> {
     ) -> Rc<dyn Origin<'a, Ctx, Mtbl = B>>
     where
         OFctr<'a, Ctx, Self>: Factory<'a, Ctx>,
+        Self::Mtbl: MentionableTop<'a, Ctx>,
     {
         let origin_r = self.clone();
         let origin_rb = self.clone();