diff --git a/avr/Makefile b/avr/Makefile
index 1c7118b..12f8fed 100644
--- a/avr/Makefile
+++ b/avr/Makefile
@@ -13,8 +13,7 @@ OBJCOPY_FLAGS	= -S
 
 AVRDUDE		= avrdude
 AVRDUDE_DEVICE	= /dev/cu.usbmodem1411
-AVRDUDE_FLAGS	= -c arduino -p atmega328p -b 115200 -D \
-		  -P $(AVRDUDE_DEVICE)
+AVRDUDE_FLAGS	= -c arduino -p atmega328p -b 115200 -D -P $(AVRDUDE_DEVICE)
 
 HEADERS_LOCAL	=
 HEADERS_BUILD	= $(HEADERS_LOCAL) \