diff --git a/variants/m5stack_coreink/variant.h b/variants/m5stack_coreink/variant.h
index f52b1bf1f..b7894741e 100644
--- a/variants/m5stack_coreink/variant.h
+++ b/variants/m5stack_coreink/variant.h
@@ -1,8 +1,11 @@
-#define I2C_SDA 32 //-1
-#define I2C_SCL 33 //-1
+#define I2C_SDA 21 //-1
+#define I2C_SCL 22 //-1
 
 //#define LED_PIN 10
 
+// PCF8563 RTC Module
+#define PCF8563_RTC 0x51
+
 #define BUTTON_NEED_PULLUP
 #define BUTTON_PIN 5