diff --git a/ngx_rtmp_amf.c b/ngx_rtmp_amf.c
index b20989c..3fe3ccf 100644
--- a/ngx_rtmp_amf.c
+++ b/ngx_rtmp_amf.c
@@ -328,7 +328,7 @@ ngx_rtmp_amf_read(ngx_rtmp_amf_ctx_t *ctx, ngx_rtmp_amf_elt_t *elts,
         } else {
             switch (ngx_rtmp_amf_get(ctx, &type8, 1)) {
                 case NGX_DONE:
-                    if (elts->type & NGX_RTMP_AMF_OPTIONAL) {
+                    if (elts && elts->type & NGX_RTMP_AMF_OPTIONAL) {
                         return NGX_OK;
                     }
                     /* fall through */