diff --git a/plugin/business/doh/src/logger.cpp b/plugin/business/doh/src/logger.cpp
index ec80cac..95dbe30 100644
--- a/plugin/business/doh/src/logger.cpp
+++ b/plugin/business/doh/src/logger.cpp
@@ -331,7 +331,7 @@ int doh_send_log(struct doh_conf *handle, const struct tfe_http_session *http, c
     cJSON_AddNumberToObject(common_obj, "common_start_time", cur_time);
     cJSON_AddNumberToObject(common_obj, "common_end_time", cur_time);
     cJSON_AddStringToObject(common_obj, "doh_version", app_proto[http->major_version]);
-    cJSON_AddStringToObject(common_obj, "common_schema_type", "DOH");
+    cJSON_AddStringToObject(common_obj, "common_schema_type", "DoH");
 
     char opt_val[24] = { 0 };
     uint16_t opt_out_size;