diff --git a/boards/common/arduino-zero/include/periph_conf.h b/boards/common/arduino-zero/include/periph_conf.h
index 939219c21a..073b25e9e0 100644
--- a/boards/common/arduino-zero/include/periph_conf.h
+++ b/boards/common/arduino-zero/include/periph_conf.h
@@ -274,6 +274,7 @@ static const i2c_conf_t i2c_config[] = {
 #ifndef RTT_FREQUENCY
 #define RTT_FREQUENCY       (32768U)    /* in Hz. For changes see `rtt.c` */
 #endif
+#define RTT_MIN_OFFSET      (10U)
 /** @} */
 
 /**