diff --git a/plugin/business/pangu-http/src/pangu_http.cpp b/plugin/business/pangu-http/src/pangu_http.cpp
index 9d3f464..a1ef650 100644
--- a/plugin/business/pangu-http/src/pangu_http.cpp
+++ b/plugin/business/pangu-http/src/pangu_http.cpp
@@ -729,11 +729,12 @@ static void http_reject(const struct tfe_http_session * session, enum tfe_http_e
 	size_t page_size = 0;
 
 	char cont_len_str[16];
-	char msg[TFE_STRING_MAX];
+
+	char msg[TFE_STRING_MAX] = "";
 	struct tfe_http_session * to_write_sess = NULL;
 
 	ret = sscanf(ctx->enforce_para, "code=%d;content=%[^\n]", &resp_code, msg);
-	if (ret != 2)
+	if (ret != 1 && ret != 2)
 	{
 		TFE_LOG_ERROR(g_pangu_rt->local_logger, "Invalid reject rule %d paramter %s",
 			ctx->enforce_rules[0].config_id, ctx->enforce_para);