diff --git a/src/event/quic/ngx_event_quic_output.c b/src/event/quic/ngx_event_quic_output.c
index add69b1a2..f121d2327 100644
--- a/src/event/quic/ngx_event_quic_output.c
+++ b/src/event/quic/ngx_event_quic_output.c
@@ -378,8 +378,10 @@ ngx_quic_create_segments(ngx_connection_t *c, ngx_quic_socket_t *qsock)
                 return NGX_ERROR;
             }
 
-            p += n;
-            nseg++;
+            if (n) {
+                p += n;
+                nseg++;
+            }
 
         } else {
             n = 0;