diff --git a/src/rcore.rs b/src/rcore.rs
index 61b4a58..56c8ccd 100644
--- a/src/rcore.rs
+++ b/src/rcore.rs
@@ -29,7 +29,7 @@ use self::dectx::DeCtxT;
 pub use self::diagnostic::Diagnostic;
 pub use self::hashing::{Hash, HASH_SIZE, HASH_ZEROS};
 pub use self::inctx::InCtx;
-pub use self::inlining::{Inlining, InliningExt};
+pub use self::inlining::{Inlining, InliningExt, InliningResultExt};
 pub use self::origin::{OFctr, Origin};
 pub use self::point::Point;
 pub use self::points::TakesPoints;
diff --git a/src/rcore/inlining.rs b/src/rcore/inlining.rs
index 2e7c643..7a97dac 100644
--- a/src/rcore/inlining.rs
+++ b/src/rcore/inlining.rs
@@ -51,3 +51,13 @@ impl<D: ?Sized + Deserializer> Inlining for &mut D {
         self.tell()
     }
 }
+
+pub trait InliningResultExt<A, E> {
+    fn seal(self) -> Result<A, E>;
+}
+
+impl<A, E, I: Inlining> InliningResultExt<A, E> for Result<(A, I), E> {
+    fn seal(self) -> Result<A, E> {
+        self.map(|(a, _)| a)
+    }
+}