diff --git a/wutil-rs/src/memory.rs b/wutil-rs/src/memory.rs
index b1def97b..2804a228 100644
--- a/wutil-rs/src/memory.rs
+++ b/wutil-rs/src/memory.rs
@@ -60,7 +60,7 @@ pub fn alloc_bytes(size: usize) -> *mut u8 {
         return ptr::null_mut();
     };
 
-    let full_segment = unsafe { alloc::alloc_zeroed(layout) };
+    let full_segment = unsafe { alloc::alloc_zeroed(full_layout) };
     if full_segment.is_null() {
         return ptr::null_mut();
     }
@@ -73,7 +73,7 @@ pub fn alloc_bytes(size: usize) -> *mut u8 {
         let header = result.sub(mem::size_of::<Header>()).cast::<Header>();
         header.write_unaligned(Header {
             ptr: NonNull::new_unchecked(full_segment),
-            layout: header_layout,
+            layout: full_layout,
             refcount: 0,
         });
     }