diff --git a/libluna/src/Heap.cpp b/libluna/src/Heap.cpp
index 81c6c45f..8c7e9fdf 100644
--- a/libluna/src/Heap.cpp
+++ b/libluna/src/Heap.cpp
@@ -105,7 +105,9 @@ static Option<HeapBlock*> split(HeapBlock* block, usize size)
     const usize offset = get_fair_offset_to_split_at(block, size + sizeof(HeapBlock));
     block->full_size = offset; // shrink the old block to fit this offset
 
-    HeapBlock* new_block = offset_ptr(block, offset + sizeof(HeapBlock));
+    HeapBlock* const new_block = offset_ptr(block, offset + sizeof(HeapBlock));
+
+    memset(new_block, 0, sizeof(*new_block));
 
     new_block->magic = BLOCK_MAGIC;
     new_block->status = (block->status & BLOCK_END_MEM) ? BLOCK_END_MEM : 0;
@@ -212,6 +214,8 @@ Result<void*> malloc_impl(usize size, bool should_scrub)
         usize pages = get_pages_for_allocation(size + sizeof(HeapBlock));
         HeapBlock* const current = (HeapBlock*)TRY(allocate_pages_impl(pages));
 
+        memset(current, 0, sizeof(*current));
+
         current->full_size = (pages * PAGE_SIZE) - sizeof(HeapBlock);
         current->magic = BLOCK_MAGIC;
         current->status = BLOCK_START_MEM | BLOCK_END_MEM;