diff --git a/ngx_rtmp_mp4_module.c b/ngx_rtmp_mp4_module.c
index a7b61c3..6107d2d 100644
--- a/ngx_rtmp_mp4_module.c
+++ b/ngx_rtmp_mp4_module.c
@@ -1116,14 +1116,11 @@ ngx_rtmp_mp4_parse_co64(ngx_rtmp_session_t *s, u_char *pos, u_char *last)
 static ngx_int_t
 ngx_rtmp_mp4_parse(ngx_rtmp_session_t *s, u_char *pos, u_char *last)
 {
-    ngx_rtmp_mp4_ctx_t         *ctx;
     uint32_t                   *hdr, tag;
     size_t                      size, nboxes;
     ngx_uint_t                  n;
     ngx_rtmp_mp4_box_t         *b;
 
-    ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_mp4_module);
-
     while (pos != last) {
         if (pos + 8 > last) {
             ngx_log_debug1(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,