diff --git a/libraries/mbed/targets/hal/TARGET_STM/TARGET_DISCO_F100RB/device.h b/libraries/mbed/targets/hal/TARGET_STM/TARGET_DISCO_F100RB/device.h
index 6c7319b692..a8f3e46ffe 100644
--- a/libraries/mbed/targets/hal/TARGET_STM/TARGET_DISCO_F100RB/device.h
+++ b/libraries/mbed/targets/hal/TARGET_STM/TARGET_DISCO_F100RB/device.h
@@ -53,6 +53,7 @@
 
 #define DEVICE_SLEEP            1
 
+#define DEVICE_ERROR_PATTERN    1 //fast blink green and blue leds on error
 //=======================================
 
 #define DEVICE_SEMIHOST         0