diff --git a/variants/m5stack_timer_cam/pins_arduino.h b/variants/m5stack_timer_cam/pins_arduino.h
index 64b442d4..ad714f7a 100644
--- a/variants/m5stack_timer_cam/pins_arduino.h
+++ b/variants/m5stack_timer_cam/pins_arduino.h
@@ -11,12 +11,20 @@
 #define digitalPinToInterrupt(p)    (((p)<40)?(p):-1)
 #define digitalPinHasPWM(p)         (p < 34)
 
+static const uint8_t LED_BUILTIN = 2;
+#define BUILTIN_LED  LED_BUILTIN // backward compatibility
+
 static const uint8_t TX = 1;
 static const uint8_t RX = 3;
 
 static const uint8_t SDA = 4;
 static const uint8_t SCL = 13;
 
+static const uint8_t SS   = 5;
+static const uint8_t MOSI = 23;
+static const uint8_t MISO = 19;
+static const uint8_t SCK  = 18;
+
 static const uint8_t G23 = 23;
 static const uint8_t G25 = 25;
 static const uint8_t G27 = 27;