diff --git a/src/vec-final.md b/src/vec-final.md
index fd6c592..a534bcf 100644
--- a/src/vec-final.md
+++ b/src/vec-final.md
@@ -49,7 +49,7 @@ impl<T> RawVec<T> {
                 Err(err) => Heap.oom(err),
             };
 
-            self.ptr = Unique::new(ptr as *mut _);
+            self.ptr = Unique::new_unchecked(ptr as *mut _);
             self.cap = new_cap;
         }
     }