diff --git a/arduino-1.6.x/hardware/RBL/RBL_nRF51822/variants/BLE_Nano/pins_arduino.h b/arduino-1.6.x/hardware/RBL/RBL_nRF51822/variants/BLE_Nano/pins_arduino.h
index 58b97cd..1a15f04 100644
--- a/arduino-1.6.x/hardware/RBL/RBL_nRF51822/variants/BLE_Nano/pins_arduino.h
+++ b/arduino-1.6.x/hardware/RBL/RBL_nRF51822/variants/BLE_Nano/pins_arduino.h
@@ -45,6 +45,7 @@
 #define TWI_SCL SCL
 
 #define LED D13
+#define LED_BUILTIN D13
 
 #endif
 
diff --git a/arduino-1.6.x/hardware/RBL/RBL_nRF51822/variants/BLE_Nano_32KB/pins_arduino.h b/arduino-1.6.x/hardware/RBL/RBL_nRF51822/variants/BLE_Nano_32KB/pins_arduino.h
index 58b97cd..1a15f04 100644
--- a/arduino-1.6.x/hardware/RBL/RBL_nRF51822/variants/BLE_Nano_32KB/pins_arduino.h
+++ b/arduino-1.6.x/hardware/RBL/RBL_nRF51822/variants/BLE_Nano_32KB/pins_arduino.h
@@ -45,6 +45,7 @@
 #define TWI_SCL SCL
 
 #define LED D13
+#define LED_BUILTIN D13
 
 #endif
 
diff --git a/arduino-1.6.x/hardware/RBL/RBL_nRF51822/variants/RBL_nRF51822/pins_arduino.h b/arduino-1.6.x/hardware/RBL/RBL_nRF51822/variants/RBL_nRF51822/pins_arduino.h
index d5a8113..1013492 100644
--- a/arduino-1.6.x/hardware/RBL/RBL_nRF51822/variants/RBL_nRF51822/pins_arduino.h
+++ b/arduino-1.6.x/hardware/RBL/RBL_nRF51822/variants/RBL_nRF51822/pins_arduino.h
@@ -56,6 +56,7 @@
 #define TWI_SCL SCL1
 
 #define LED D13
+#define LED_BUILTIN D13
 
 #endif
 
diff --git a/arduino-1.6.x/hardware/RBL/RBL_nRF51822/variants/RBL_nRF51822_32KB/pins_arduino.h b/arduino-1.6.x/hardware/RBL/RBL_nRF51822/variants/RBL_nRF51822_32KB/pins_arduino.h
index d5a8113..1013492 100644
--- a/arduino-1.6.x/hardware/RBL/RBL_nRF51822/variants/RBL_nRF51822_32KB/pins_arduino.h
+++ b/arduino-1.6.x/hardware/RBL/RBL_nRF51822/variants/RBL_nRF51822_32KB/pins_arduino.h
@@ -56,6 +56,7 @@
 #define TWI_SCL SCL1
 
 #define LED D13
+#define LED_BUILTIN D13
 
 #endif