--- ./Makefile.orig	2014-02-19 10:24:15.411792348 +0100
+++ ./Makefile	2014-02-19 10:25:09.252791282 +0100
@@ -18,18 +18,18 @@
 	rm -f *.so
 
 install:
-	mkdir $(PREFIX)/include/fortuna
-	$(INSTALL) -m 644 ./src/fortuna.h $(PREFIX)/include/fortuna/
-	$(INSTALL) -m 644 ./src/px.h $(PREFIX)/include/fortuna/
-	$(INSTALL) -m 644 ./src/rijndael.h $(PREFIX)/include/fortuna/
-	$(INSTALL) -m 644 ./src/sha2.h $(PREFIX)/include/fortuna/
-	$(INSTALL) -m 644 ./src/c.h $(PREFIX)/include/fortuna/
-	$(INSTALL) -m 644 ./src/blf.h $(PREFIX)/include/fortuna/
-	$(INSTALL) -m 644 ./src/sha1.h $(PREFIX)/include/fortuna/
-	$(INSTALL) -m 644 ./src/internal.h $(PREFIX)/include/fortuna/
-	$(INSTALL) -m 644 ./src/md5.h $(PREFIX)/include/fortuna/
-	$(INSTALL) -m 644 ./libfortuna.a $(PREFIX)/lib/
-	$(INSTALL) -m 644 ./libfortuna.so $(PREFIX)/lib/
+	mkdir $(DESTDIR)$(PREFIX)/include/fortuna
+	$(INSTALL) -m 644 ./src/fortuna.h $(DESTDIR)$(PREFIX)/include/fortuna/
+	$(INSTALL) -m 644 ./src/px.h $(DESTDIR)$(PREFIX)/include/fortuna/
+	$(INSTALL) -m 644 ./src/rijndael.h $(DESTDIR)$(PREFIX)/include/fortuna/
+	$(INSTALL) -m 644 ./src/sha2.h $(DESTDIR)$(PREFIX)/include/fortuna/
+	$(INSTALL) -m 644 ./src/c.h $(DESTDIR)$(PREFIX)/include/fortuna/
+	$(INSTALL) -m 644 ./src/blf.h $(DESTDIR)$(PREFIX)/include/fortuna/
+	$(INSTALL) -m 644 ./src/sha1.h $(DESTDIR)$(PREFIX)/include/fortuna/
+	$(INSTALL) -m 644 ./src/internal.h $(DESTDIR)$(PREFIX)/include/fortuna/
+	$(INSTALL) -m 644 ./src/md5.h $(DESTDIR)$(PREFIX)/include/fortuna/
+	$(INSTALL) -m 644 ./libfortuna.a $(DESTDIR)$(PREFIX)/lib/
+	$(INSTALL) -m 644 ./libfortuna.so $(DESTDIR)$(PREFIX)/lib/
 
 deinstall:
 	rm -Rf $(PREFIX)/include/fortuna