diff --git a/firmware/SOURCES b/firmware/SOURCES
index 0371cea684..67bb5adbe4 100644
--- a/firmware/SOURCES
+++ b/firmware/SOURCES
@@ -194,6 +194,8 @@ drivers/rtc/rtc_tcc77x.c
 drivers/rtc/rtc_jz4740.c
 #elif (CONFIG_RTC == RTC_S35390A)
 drivers/rtc/rtc_s35390a.c
+#elif (CONFIG_RTC == RTC_D2)
+drivers/rtc/rtc_d2.c
 #endif /* (CONFIG_RTC == RTC_) */
 #endif /* SIMULATOR */