diff --git a/src/arena.c b/src/arena.c
index 1de14dbe..cc5d4f01 100644
--- a/src/arena.c
+++ b/src/arena.c
@@ -2279,7 +2279,7 @@ static void mi_heap_delete_pages(mi_heap_t* heap, mi_heap_t* heap_target) {
   #if MI_DEBUG>1
   // no more arena pages?
   for (size_t i = 0; i < MI_ARENA_BIN_COUNT; i++) {
-    mi_arena_pages_t* const arena_pages = mi_atomic_load_relaxed(&heap->arena_pages[i]);
+    mi_arena_pages_t* const arena_pages = mi_atomic_load_ptr_relaxed(mi_arena_pages_t const , &heap->arena_pages[i]);
     if (arena_pages!=NULL) {
       mi_assert_internal(mi_bitmap_is_all_clear(arena_pages->pages));
     }
diff --git a/src/init.c b/src/init.c
index 3161450f..3954d3ab 100644
--- a/src/init.c
+++ b/src/init.c
@@ -414,7 +414,7 @@ mi_heap_t* _mi_subproc_heap_main(mi_subproc_t* subproc) {
   }
   else {
     mi_heap_main_init();
-    mi_assert_internal(mi_atomic_load_relaxed(&subproc->heap_main) != NULL);
+    mi_assert_internal(mi_atomic_load_ptr_relaxed(void, &subproc->heap_main) != NULL);
     return mi_atomic_load_ptr_relaxed(mi_heap_t,&subproc->heap_main);
   }
 }