diff --git a/lib/include/maca.h b/lib/include/maca.h
index 1540f682e..cd179e6d3 100644
--- a/lib/include/maca.h
+++ b/lib/include/maca.h
@@ -137,6 +137,7 @@ extern volatile uint8_t fcs_mode;
 #define set_fcs_mode(x) fcs_mode = (x)
 
 extern void maca_rx_callback(volatile packet_t *p) __attribute__((weak));
+extern void maca_tx_callback(volatile packet_t *p) __attribute__((weak));
 
 /******************************************************************************/
 /* everything under this comment is messy, needs cleaning, and will           */
diff --git a/lib/maca.c b/lib/maca.c
index f48c7bee3..804f0622c 100644
--- a/lib/maca.c
+++ b/lib/maca.c
@@ -2,7 +2,7 @@
 #include <stdio.h>
 
 #ifndef DEBUG_MACA 
-#define DEBUG_MACA 0
+#define DEBUG_MACA 1
 #endif
 #if (DEBUG_MACA == 0)
 #define PRINTF(...) 
@@ -401,11 +401,12 @@ void maca_isr(void) {
 	if(action_complete_irq()) {
 		/* PRINTF("maca action complete %d\n\r", get_field(*MACA_CONTROL,SEQUENCE)); */
 		if(last_post == TX_POST) {
+			if(maca_tx_callback != 0) { maca_tx_callback(tx_head); }
 			free_tx_head();
 			last_post = NO_POST;
 		}
 		ResumeMACASync();
-		*MACA_CLRIRQ = (1 << maca_irq_acpl);
+		*MACA_CLRIRQ = (1 << maca_irq_acpl);		
 	}
 
 	decode_status();