diff --git a/boards/z1/include/board.h b/boards/z1/include/board.h
index 1e308b7eeb..4320edcf0b 100644
--- a/boards/z1/include/board.h
+++ b/boards/z1/include/board.h
@@ -50,6 +50,14 @@ extern "C" {
 #define XTIMER_BACKOFF              (40)
 /** @} */
 
+/**
+ * @name    ztimer configuration values
+ * @{
+ */
+#define CONFIG_ZTIMER_USEC_ADJUST_SET     (96)
+#define CONFIG_ZTIMER_USEC_ADJUST_SLEEP   (97)
+/** @} */
+
 /**
  * @name    CPU core configuration
  * @{