diff --git a/lib/nghttp3_map.c b/lib/nghttp3_map.c
index e8eb811..a80955a 100644
--- a/lib/nghttp3_map.c
+++ b/lib/nghttp3_map.c
@@ -131,7 +131,6 @@ int nghttp3_map_each(nghttp3_map *map,
 
 void nghttp3_map_entry_init(nghttp3_map_entry *entry, key_type key) {
   entry->key = key;
-  entry->next = NULL;
 }
 
 /* FNV1a hash */
diff --git a/lib/nghttp3_map.h b/lib/nghttp3_map.h
index 4dc9925..2eae2e7 100644
--- a/lib/nghttp3_map.h
+++ b/lib/nghttp3_map.h
@@ -43,7 +43,6 @@ typedef uint64_t key_type;
 typedef struct nghttp3_map_entry nghttp3_map_entry;
 
 struct nghttp3_map_entry {
-  nghttp3_map_entry *next;
   key_type key;
 };
 
diff --git a/lib/nghttp3_qpack.c b/lib/nghttp3_qpack.c
index 4aae1a5..6837942 100644
--- a/lib/nghttp3_qpack.c
+++ b/lib/nghttp3_qpack.c
@@ -1714,7 +1714,6 @@ int nghttp3_qpack_stream_new(nghttp3_qpack_stream **pstream, int64_t stream_id,
 
   nghttp3_pq_init(&stream->max_cnts, ref_max_cnt_greater, mem);
 
-  stream->me.next = NULL;
   stream->me.key = (uint64_t)stream_id;
 
   *pstream = stream;