diff --git a/src/http/modules/ngx_http_grpc_module.c b/src/http/modules/ngx_http_grpc_module.c
index 0b8bb5281..aa7576561 100644
--- a/src/http/modules/ngx_http_grpc_module.c
+++ b/src/http/modules/ngx_http_grpc_module.c
@@ -1969,6 +1969,7 @@ ngx_http_grpc_filter_init(void *data)
         }
 
         u->length = 0;
+        ctx->done = 1;
 
     } else {
         u->length = 1;