diff --git a/include/mimalloc-types.h b/include/mimalloc-types.h
index 89eaf316..b3f247b0 100644
--- a/include/mimalloc-types.h
+++ b/include/mimalloc-types.h
@@ -117,7 +117,7 @@ terms of the MIT license. A copy of the license can be found in the file
 #define MI_SEGMENT_ALIGN                  MI_SEGMENT_SIZE
 #define MI_SEGMENT_MASK                   (MI_SEGMENT_SIZE - 1)
 #define MI_SEGMENT_SLICE_SIZE             (1ULL<< MI_SEGMENT_SLICE_SHIFT)
-#define MI_SLICES_PER_SEGMENT             (MI_SEGMENT_SIZE / MI_SEGMENT_SLICE_SIZE) // 1024
+#define MI_SLICES_PER_SEGMENT             (MI_SEGMENT_SIZE / MI_SEGMENT_SLICE_SIZE) // 128
 
 #define MI_SMALL_PAGE_SIZE                (1ULL<<MI_SMALL_PAGE_SHIFT)
 #define MI_MEDIUM_PAGE_SIZE               (1ULL<<MI_MEDIUM_PAGE_SHIFT)