diff --git a/lib/nghttp3_conn.c b/lib/nghttp3_conn.c
index cdd2583..49273ab 100644
--- a/lib/nghttp3_conn.c
+++ b/lib/nghttp3_conn.c
@@ -250,7 +250,7 @@ static int conn_new(nghttp3_conn **pconn, int server, int callbacks_version,
 
   nghttp3_objalloc_init(&conn->out_chunk_objalloc,
                         NGHTTP3_STREAM_MIN_CHUNK_SIZE * 16, mem);
-  nghttp3_objalloc_stream_init(&conn->stream_objalloc, 64, mem);
+  nghttp3_objalloc_stream_init(&conn->stream_objalloc, 8, mem);
 
   nghttp3_map_init(&conn->streams, mem);
 
diff --git a/lib/nghttp3_ksl.c b/lib/nghttp3_ksl.c
index 611af65..fce7952 100644
--- a/lib/nghttp3_ksl.c
+++ b/lib/nghttp3_ksl.c
@@ -61,8 +61,7 @@ void nghttp3_ksl_init(nghttp3_ksl *ksl, nghttp3_ksl_compar compar,
   size_t nodelen = ksl_nodelen(keylen);
 
   nghttp3_objalloc_init(&ksl->blkalloc,
-                        ((ksl_blklen(nodelen) + 0xfu) & ~(uintptr_t)0xfu) * 8,
-                        mem);
+                        (ksl_blklen(nodelen) + 0xfu) & ~(uintptr_t)0xfu, mem);
 
   ksl->head = NULL;
   ksl->front = ksl->back = NULL;