diff --git a/src/iflytop/core/core.hpp b/src/iflytop/core/core.hpp
index e339a65..696d384 100644
--- a/src/iflytop/core/core.hpp
+++ b/src/iflytop/core/core.hpp
@@ -6,11 +6,11 @@
 #include <list>
 #include <map>
 #include <memory>
+#include <mutex>
 #include <set>
 #include <sstream>
 #include <string>
 #include <vector>
-#include <mutex>
 
 #include "iflytop/core/basic/nlohmann/json.hpp"
 #include "iflytop/core/basic/nod/nod.hpp"
@@ -19,3 +19,5 @@
 #include "iflytop/core/error/error_code.hpp"
 #include "iflytop/core/spdlogfactory/logger.hpp"
 #include "iflytop/core/thread/thread.hpp"
+
+#define ZARRAYSIZE(a) (sizeof(a) / sizeof(a[0]))
\ No newline at end of file