diff --git a/ports/atmel-samd/boards/pirkey_m0/mpconfigboard.mk b/ports/atmel-samd/boards/pirkey_m0/mpconfigboard.mk
index 6b252e89be..8bac356049 100644
--- a/ports/atmel-samd/boards/pirkey_m0/mpconfigboard.mk
+++ b/ports/atmel-samd/boards/pirkey_m0/mpconfigboard.mk
@@ -13,7 +13,7 @@ LONGINT_IMPL = NONE
 CIRCUITPY_ANALOGIO = 0
 CIRCUITPY_MATH = 0
 CIRCUITPY_NEOPIXEL_WRITE = 0
-#CIRCUITPY_RTC = 0
+CIRCUITPY_RTC = 0
 CIRCUITPY_SAMD = 0
 CIRCUITPY_USB_MIDI = 0
 CIRCUITPY_SMALL_BUILD = 1