diff --git a/ngx_rtmp_eval.c b/ngx_rtmp_eval.c
index 1e5195a90..c658f14ef 100644
--- a/ngx_rtmp_eval.c
+++ b/ngx_rtmp_eval.c
@@ -166,6 +166,7 @@ ngx_rtmp_eval(void *ctx, ngx_str_t *in, ngx_rtmp_eval_t **e, ngx_str_t *out,
                         state = ESCAPE;
                         continue;
                 }
+                /* fall through */
 
             case ESCAPE:
                 ngx_rtmp_eval_append(&b, &c, 1, log);