diff --git a/include/sys.h b/include/sys.h
index c2d9507..e76095c 100644
--- a/include/sys.h
+++ b/include/sys.h
@@ -31,4 +31,6 @@ void zsys_loop();
 #define ZLOGI(...) NRF_LOG_INFO(__VA_ARGS__)
 #define ZLOGE(...) NRF_LOG_ERROR(__VA_ARGS__)
 #define ZLOGW(...) NRF_LOG_WARNING(__VA_ARGS__)
-#define ZLOGD(...) NRF_LOG_DEBUG(__VA_ARGS__)
\ No newline at end of file
+#define ZLOGD(...) NRF_LOG_DEBUG(__VA_ARGS__)
+
+#define ZARRAY_SIZE(array) (sizeof(array) / sizeof(array[0]))
\ No newline at end of file