diff --git a/src/page.c b/src/page.c
index dcd39ed7..42dfdfbf 100644
--- a/src/page.c
+++ b/src/page.c
@@ -393,8 +393,7 @@ void _mi_page_free(mi_page_t* page, mi_page_queue_t* pq, bool force) {
   _mi_segment_page_free(page, force, segments_tld);
 }
 
-
-#define MI_MAX_RETIRE_SIZE  (4*MI_SMALL_SIZE_MAX)
+#define MI_MAX_RETIRE_SIZE    (4*MI_SMALL_SIZE_MAX)
 
 // Retire a page with no more used blocks
 // Important to not retire too quickly though as new
diff --git a/src/region.c b/src/region.c
index 92758229..fd7d4544 100644
--- a/src/region.c
+++ b/src/region.c
@@ -284,7 +284,7 @@ static void* mi_region_try_alloc(size_t blocks, bool* commit, bool* is_large, bo
   mi_assert_internal(!(info.x.is_large && !*is_large));
   mi_assert_internal(start != NULL);
 
-  *is_zero = mi_bitmap_unclaim(&region->dirty, 1, blocks, bit_idx);  
+  *is_zero = mi_bitmap_claim(&region->dirty, 1, blocks, bit_idx, NULL);  
   *is_large = info.x.is_large;
   *memid = mi_memid_create(region, bit_idx);
   void* p = start + (mi_bitmap_index_bit_in_field(bit_idx) * MI_SEGMENT_SIZE);