diff --git a/src/arch/x86/kmem.hpp b/src/arch/x86/kmem.hpp
index b58991778..ccb200ac4 100644
--- a/src/arch/x86/kmem.hpp
+++ b/src/arch/x86/kmem.hpp
@@ -20,7 +20,7 @@ struct HeapEntry {
     struct HeapEntry *prev;
     uint64_t          len;
     char              data[] __attribute__((aligned(16)));
-} __attribute__((packed, aligned(1)));
+} __attribute__((packed, aligned(16)));
 
 extern struct HeapEntry *KERN_HeapBegin;
 extern uintptr_t         KERN_HeapEnd; // Past the end