diff --git a/drivers/rtt_rtc/Kconfig b/drivers/rtt_rtc/Kconfig
index 68cbf8c42c42..93c0227600c0 100644
--- a/drivers/rtt_rtc/Kconfig
+++ b/drivers/rtt_rtc/Kconfig
@@ -10,5 +10,6 @@ config MODULE_RTT_RTC
     depends on HAS_PERIPH_RTT
     depends on TEST_KCONFIG
     select MODULE_PERIPH_RTT
+    select MODULE_RTC_UTILS
     help
         Basic RTC implementation based on a RTT.
diff --git a/makefiles/features_modules.inc.mk b/makefiles/features_modules.inc.mk
index 9c3785c3f3a9..3fb6eccf6f52 100644
--- a/makefiles/features_modules.inc.mk
+++ b/makefiles/features_modules.inc.mk
@@ -52,7 +52,7 @@ ifneq (,$(filter periph_%, $(USEMODULE)))
 endif
 
 # include rtc_utils if periph_rtc is used
-ifneq (,$(filter periph_rtc, $(USEMODULE)))
+ifneq (,$(filter periph_rtc,$(USEMODULE)))
   USEMODULE += rtc_utils
 endif
 
diff --git a/sys/Makefile.dep b/sys/Makefile.dep
index 3cf58b0b7c03..c395420f8556 100644
--- a/sys/Makefile.dep
+++ b/sys/Makefile.dep
@@ -853,4 +853,8 @@ ifneq (,$(filter fido2_ctap,$(USEMODULE)))
   USEMODULE += fido2
 endif
 
+ifneq (,$(filter rtt_rtc,$(USEMODULE)))
+  USEMODULE += rtc_utils
+endif
+
 include $(RIOTBASE)/sys/test_utils/Makefile.dep