diff --git a/kernel/src/memory/Heap.cpp b/kernel/src/memory/Heap.cpp
index 41ddf176..dfd0ae5f 100644
--- a/kernel/src/memory/Heap.cpp
+++ b/kernel/src/memory/Heap.cpp
@@ -185,7 +185,9 @@ Result<void*> kmalloc(usize size)
         block->next = block->last = nullptr;
         heap_start = block;
 
-        if (!heap_end) heap_end = heap_start;
+        check(!heap_end);
+
+        heap_end = heap_start;
     }
 
     HeapBlock* block = heap_start;