diff --git a/Makefile b/Makefile
index 91017f0..1c2ba80 100644
--- a/Makefile
+++ b/Makefile
@@ -1,3 +1,5 @@
+PREFIX := /usr/local
+
 
 default: testj1939
 all: default $(patsubst %.md, %.html, $(wildcard *.md))
@@ -5,8 +7,11 @@ all: default $(patsubst %.md, %.html, $(wildcard *.md))
 %.html: %.md page.theme
 	theme -f -o $@ $< -p "$*"
 
-CFLAGS	= -Wall -g3 -O0
+CFLAGS	+= -Wall -g3 -O0
 CPPFLAGS += -Iinclude/uapi
 
+install:
+	install -D -m 755 testj1939 ${DESTDIR}${PREFIX}/bin/testj1939
+
 clean:
 	rm -f testj1939 $(wildcard *.html)