--- a/src/event/quic/ngx_event_quic_frames.h
+++ b/src/event/quic/ngx_event_quic_frames.h
@@ -23,13 +23,13 @@ void ngx_quic_queue_frame(ngx_quic_conne
 ngx_int_t ngx_quic_split_frame(ngx_connection_t *c, ngx_quic_frame_t *f,
     size_t len);
 
-ngx_chain_t *ngx_quic_alloc_buf(ngx_connection_t *c);
+ngx_chain_t *ngx_quic_alloc_chain(ngx_connection_t *c);
 ngx_chain_t *ngx_quic_copy_buf(ngx_connection_t *c, u_char *data,
     size_t len);
 ngx_chain_t *ngx_quic_copy_chain(ngx_connection_t *c, ngx_chain_t *in,
     size_t limit);
-void ngx_quic_trim_bufs(ngx_chain_t *in, size_t size);
-void ngx_quic_free_bufs(ngx_connection_t *c, ngx_chain_t *in);
+void ngx_quic_trim_chain(ngx_chain_t *in, size_t size);
+void ngx_quic_free_chain(ngx_connection_t *c, ngx_chain_t *in);
 ngx_chain_t *ngx_quic_read_chain(ngx_connection_t *c, ngx_chain_t **chain,
     off_t limit);
 ngx_chain_t *ngx_quic_write_chain(ngx_connection_t *c, ngx_chain_t **chain,