diff --git a/cpu/fe310/Makefile.dep b/cpu/fe310/Makefile.dep
index 2728a327db..725d8c9daf 100644
--- a/cpu/fe310/Makefile.dep
+++ b/cpu/fe310/Makefile.dep
@@ -1,3 +1,3 @@
 ifneq (,$(filter periph_rtc,$(USEMODULE)))
-  USEMODULE += periph_rtt
+  FEATURES_REQUIRED += periph_rtt
 endif