diff --git a/zcancmder_protocol_basic.hpp b/zcancmder_protocol_basic.hpp
index 591d86d..798f165 100644
--- a/zcancmder_protocol_basic.hpp
+++ b/zcancmder_protocol_basic.hpp
@@ -34,7 +34,6 @@
     uint32_t errorcode                     = 0;                          \
     if (cmd->id == varid) {
 #define PROCESS_REPORT(type)                                                 \
-  zlock_guard l(m_lock);                                                     \
   auto*       report = (type##_report_t*)m_txbuf;                            \
   static_assert(sizeof(*report) < sizeof(m_txbuf), "report size too large"); \
   ZLOGI(TAG, #type " exec_status:%d", status);                               \