diff --git a/src/space.h b/src/space.h
index 7ddbf0d29d25822322719a85d620f31538b7f2e0..93f989a5a3eb7bdb052d64abcd90867f4cd1fb30 100644
--- a/src/space.h
+++ b/src/space.h
@@ -43,8 +43,8 @@ struct cell;
 #define space_cellallocchunk 1000
 #define space_splitsize_default 400
 #define space_maxsize_default 8000000
-#define space_subsize_pair_default 64000000
-#define space_subsize_self_default 16000
+#define space_subsize_pair_default 256000000
+#define space_subsize_self_default 32000
 #define space_maxcount_default 10000
 #define space_max_top_level_cells_default 12
 #define space_stretch 1.10f