diff --git a/od/Makefile b/od/Makefile
new file mode 100644
index 0000000..f299abc
--- /dev/null
+++ b/od/Makefile
@@ -0,0 +1,14 @@
+CC=gcc
+CFLAGS=-O2 -g -Wall
+CPPFLAGS=-I../include
+
+ODOBJS=	od.o
+LIBOBJS=../lib/pdp10-extint.o ../lib/pdp10-stdio.o
+
+od:	$(ODOBJS) $(LIBOBJS)
+	$(LINK.c) -o $@ $^
+
+od.o:	od.c ../include/pdp10-extint.h ../include/pdp10-inttypes.h ../include/pdp10-stdint.h ../include/pdp10-stdio.h
+
+clean:
+	rm -f $(ODOBJS) a.out core.*