diff --git a/src/http/modules/ngx_http_ssi_filter_module.c b/src/http/modules/ngx_http_ssi_filter_module.c
index 5343ca0be..549ae4ce2 100644
--- a/src/http/modules/ngx_http_ssi_filter_module.c
+++ b/src/http/modules/ngx_http_ssi_filter_module.c
@@ -800,8 +800,14 @@ ngx_http_ssi_body_filter(ngx_http_request_t *r, ngx_chain_t *in)
                     }
                 }
 
-                if (cmd->flush && ctx->out) {
-                    rc = ngx_http_ssi_output(r, ctx);
+                if (cmd->flush) {
+
+                    if (ctx->out) {
+                        rc = ngx_http_ssi_output(r, ctx);
+
+                    } else {
+                        rc = ngx_http_next_body_filter(r, NULL);
+                    }
 
                     if (rc == NGX_ERROR) {
                         return NGX_ERROR;