diff --git a/src/Makefile b/src/Makefile
index f9c2c39..5e3b26a 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -1,6 +1,6 @@
 SRC = irmc.c cwprotocol.c beep.c util.c
 OBJ = ${SRC:.c=.o}
-LDFLAGS = -lportaudio -lpthread -lm -lwiringPi
+LDFLAGS = -lportaudio -lpthread -lm -lWiringPi
 CFLAGS = -Wall -Wno-format-zero-length
 INSTALLDIR = ${HOME}/bin
 
diff --git a/src/irmc.c b/src/irmc.c
index 8d6b39c..b8ef0ee 100644
--- a/src/irmc.c
+++ b/src/irmc.c
@@ -77,6 +77,11 @@ void txloop (void)
 
 		//printf("space: %i\n", tx_data_packet.code[tx_data_packet.n -1]);
 		while(serial_status & TIOCM_DSR) ioctl(fd_serial, TIOCMGET, &serial_status);
+#ifdef RASPI
+		while(digitalRead(5)==1) 
+{
+}
+#endif
 		key_release_t1 = fastclock();
 
 		tx_data_packet.n++;	
@@ -87,6 +92,9 @@ void txloop (void)
 		while(1){
 			ioctl(fd_serial, TIOCMGET, &serial_status);
 			if(serial_status & TIOCM_DSR) break;
+#ifdef RASPI
+			if(digitalRead(5)==1) break;
+#endif
 			tx_timeout = fastclock() - key_release_t1;
 			if(tx_timeout > TX_TIMEOUT) return;
 		}