diff --git a/blog/content/second-edition/posts/10-heap-allocation/index.md b/blog/content/second-edition/posts/10-heap-allocation/index.md
index 2e1b7a94..1f723bfa 100644
--- a/blog/content/second-edition/posts/10-heap-allocation/index.md
+++ b/blog/content/second-edition/posts/10-heap-allocation/index.md
@@ -423,7 +423,9 @@ pub fn init_heap(
             .allocate_frame()
             .ok_or(MapToError::FrameAllocationFailed)?;
         let flags = PageTableFlags::PRESENT | PageTableFlags::WRITABLE;
-        mapper.map_to(page, frame, flags, frame_allocator)?.flush();
+        unsafe {
+            mapper.map_to(page, frame, flags, frame_allocator)?.flush()
+        };
     }
 
     Ok(())