diff --git a/src/hb-pool.hh b/src/hb-pool.hh
index e4bb64f62..ee43721a3 100644
--- a/src/hb-pool.hh
+++ b/src/hb-pool.hh
@@ -31,7 +31,7 @@
 
 /* Memory pool for persistent allocation of small objects. */
 
-template <typename T, unsigned ChunkLen = 16>
+template <typename T, unsigned ChunkLen = 32>
 struct hb_pool_t
 {
   hb_pool_t () : next (nullptr) {}