diff --git a/src/conversions.rs b/src/conversions.rs
index acc061ba..e7ec4a59 100644
--- a/src/conversions.rs
+++ b/src/conversions.rs
@@ -139,3 +139,9 @@ impl<T, const N: usize, A: Allocator> From<SmallVec<T, N, A>> for Box<[T]> {
         Vec::from(this).into_boxed_slice()
     }
 }
+
+impl<T, const N: usize> From<Box<[T]>> for SmallVec<T, N> {
+    fn from(boxed: Box<[T]>) -> Self {
+        Self::from_vec(boxed.into_vec())
+    }
+}