diff --git a/Makefile b/Makefile
index a232501..40a58b0 100644
--- a/Makefile
+++ b/Makefile
@@ -2,6 +2,7 @@ LD=-lusb-1.0
 CC=gcc
 CFLAGS=-Os
 LINKS=-lm
+DOCCO=docco
 
 usbscale: usbscale.c scales.h
 	$(CC) usbscale.c -o usbscale $(LINKS) $(CFLAGS) $(LD)
@@ -9,6 +10,9 @@ usbscale: usbscale.c scales.h
 lsscale: lsscale.c scales.h
 	$(CC) lsscale.c -o lsscale $(CFLAGS) $(LD)
 
+docs: usbscale.c
+	docco usbscale.c
+
 clean:
 	rm -f lsscale
 	rm -f usbscale