diff --git a/boards/atmega256rfr2-xpro/include/board.h b/boards/atmega256rfr2-xpro/include/board.h
index 7e4edde9fa..22b61528af 100644
--- a/boards/atmega256rfr2-xpro/include/board.h
+++ b/boards/atmega256rfr2-xpro/include/board.h
@@ -42,6 +42,14 @@ extern "C" {
 #define XTIMER_BACKOFF              (40)
 /** @} */
 
+/**
+ * @name    ztimer configuration values
+ * @{
+ */
+#define CONFIG_ZTIMER_USEC_ADJUST_SET     (128)
+#define CONFIG_ZTIMER_USEC_ADJUST_SLEEP   (128)
+/** @} */
+
 /**
  * @name    Macros for controlling the on-board LED
  * @{