diff --git a/src/mem/largealloc.h b/src/mem/largealloc.h
index d9a80cf..4745471 100644
--- a/src/mem/largealloc.h
+++ b/src/mem/largealloc.h
@@ -68,7 +68,8 @@ namespace snmalloc
      * Primitive allocator for structure that are required before
      * the allocator can be running.
      ***/
-    void* alloc_chunk(size_t size, size_t alignment = 64)
+    template<size_t alignment = 64>
+    void* alloc_chunk(size_t size)
     {
       // Cache line align
       size = bits::align_up(size, 64);
diff --git a/src/mem/pagemap.h b/src/mem/pagemap.h
index 1f4595b..ad0d91a 100644
--- a/src/mem/pagemap.h
+++ b/src/mem/pagemap.h
@@ -87,7 +87,7 @@ namespace snmalloc
           {
             auto& v = default_memory_provider;
             value =
-              (PagemapEntry*)v.alloc_chunk(PAGEMAP_NODE_SIZE, OS_PAGE_SIZE);
+              (PagemapEntry*)v.alloc_chunk<OS_PAGE_SIZE>(PAGEMAP_NODE_SIZE);
             e->store(value, std::memory_order_release);
           }
           else