diff --git a/src/mm/allocator.rs b/src/mm/allocator.rs
index 615a3e2c09..941fff33b6 100644
--- a/src/mm/allocator.rs
+++ b/src/mm/allocator.rs
@@ -3,7 +3,6 @@
 
 use core::alloc::{GlobalAlloc, Layout};
 
-use align_address::Align;
 use hermit_sync::RawInterruptTicketMutex;
 use talc::{ErrOnOom, Span, Talc, Talck};
 
@@ -16,13 +15,10 @@ impl LockedAllocator {
 
 	#[inline]
 	fn align_layout(layout: Layout) -> Layout {
-		let size = layout
-			.size()
-			.align_up(core::mem::size_of::<crossbeam_utils::CachePadded<u8>>());
 		let align = layout
 			.align()
 			.max(core::mem::align_of::<crossbeam_utils::CachePadded<u8>>());
-		Layout::from_size_align(size, align).unwrap()
+		Layout::from_size_align(layout.size(), align).unwrap()
 	}
 
 	pub unsafe fn init(&self, heap_bottom: *mut u8, heap_size: usize) {
@@ -45,6 +41,16 @@ unsafe impl GlobalAlloc for LockedAllocator {
 		let layout = Self::align_layout(layout);
 		unsafe { self.0.dealloc(ptr, layout) }
 	}
+
+	unsafe fn alloc_zeroed(&self, layout: Layout) -> *mut u8 {
+		let layout = Self::align_layout(layout);
+		unsafe { self.0.alloc_zeroed(layout) }
+	}
+
+	unsafe fn realloc(&self, ptr: *mut u8, layout: Layout, new_size: usize) -> *mut u8 {
+		let layout = Self::align_layout(layout);
+		unsafe { self.0.realloc(ptr, layout, new_size) }
+	}
 }
 
 #[cfg(all(test, not(target_os = "none")))]