diff --git a/src/avr_usart.c b/src/avr_usart.c
index 7a4d19a..0cdc05e 100644
--- a/src/avr_usart.c
+++ b/src/avr_usart.c
@@ -11,6 +11,13 @@
 #include "avr_usart.h"
 
 
+#if DEBUG == 1
+#define debug(data, data_len) serial0_write(data, data_len)
+#else
+#define debug_led(data, data_len)
+#endif
+
+
 //#############################
 //Globals
 //#############################