diff --git a/boards/openmote-b/Makefile.features b/boards/openmote-b/Makefile.features
index d36aa48436..e670985d02 100644
--- a/boards/openmote-b/Makefile.features
+++ b/boards/openmote-b/Makefile.features
@@ -4,6 +4,7 @@ CPU_MODEL = cc2538sf53
 # Put defined MCU peripherals here (in alphabetical order)
 FEATURES_PROVIDED += periph_adc
 FEATURES_PROVIDED += periph_i2c
+FEATURES_PROVIDED += periph_rtt
 FEATURES_PROVIDED += periph_spi
 FEATURES_PROVIDED += periph_timer
 FEATURES_PROVIDED += periph_uart