diff --git a/src/SigLed.h b/src/SigLed.h
index 52220a1..6313ab2 100644
--- a/src/SigLed.h
+++ b/src/SigLed.h
@@ -31,6 +31,9 @@ enum {
     LEDS_RESTART = 0xc0
 };
 
+#define SLED_ONFOR(a) (uint8_t)(LEDS_ONFOR + a - 1)
+#define SLED_OFFFOR(a) (uint8_t)(LEDS_OFFFOR + a - 1)
+
 class SigLED {
 
   protected: