diff --git a/Makefile b/Makefile
index d01add2..7360351 100644
--- a/Makefile
+++ b/Makefile
@@ -1,10 +1,11 @@
-
+PROG = tomb
 PREFIX ?= /usr/local
+MANDIR ?= /usr/share/man
 
 all:
 	@echo "Tomb is a script and does not need compilation, it can be simply executed."
 	@echo "To install it in /usr/local together with its manpage use 'make install'."
 
 install:
-	install tomb $(PREFIX)/bin
-	install doc/tomb.1 $(PREFIX)/share/man/man1
+	@install -Dm755 ${PROG} ${DESTDIR}${PREFIX}/bin/${PROG}
+	@install -Dm666 doc/${PROG}.1 ${DESTDIR}${MANDIR}/man1/${PROG}.1