diff --git a/Makefile b/Makefile
index f39c702..1cc46b4 100644
--- a/Makefile
+++ b/Makefile
@@ -110,16 +110,16 @@ depend:
 	makedepend -f$(MAKEFILE_LIST) -Y $(OBJS:.o=.c) 2>/dev/null
 
 install:	$(HEADERS) $(STATICLIB) $(SHAREDLIB) natpmpc-shared natpmp.pc
-	$(INSTALL) -d $(INSTALLDIRINC)
-	$(INSTALL) -m 644 $(HEADERS) $(INSTALLDIRINC)
-	$(INSTALL) -d $(INSTALLDIRLIB)
-	$(INSTALL) -m 644 $(STATICLIB) $(INSTALLDIRLIB)
-	$(INSTALL) -m 644 $(SHAREDLIB) $(INSTALLDIRLIB)/$(SONAME)
+	$(INSTALL) -d $(DESTDIR)$(INSTALLDIRINC)
+	$(INSTALL) -m 644 $(HEADERS) $(DESTDIR)$(INSTALLDIRINC)
+	$(INSTALL) -d $(DESTDIR)$(INSTALLDIRLIB)
+	$(INSTALL) -m 644 $(STATICLIB) $(DESTDIR)$(INSTALLDIRLIB)
+	$(INSTALL) -m 644 $(SHAREDLIB) $(DESTDIR)$(INSTALLDIRLIB)/$(SONAME)
 	$(INSTALL) -d $(DESTDIR)$(PKGCONFIGDIR)
 	$(INSTALL) -m 644 natpmp.pc $(DESTDIR)$(PKGCONFIGDIR)
-	$(INSTALL) -d $(INSTALLDIRBIN)
-	$(INSTALL) -m 755 natpmpc-shared $(INSTALLDIRBIN)/natpmpc
-	ln -s -f $(SONAME) $(INSTALLDIRLIB)/$(SHAREDLIB)
+	$(INSTALL) -d $(DESTDIR)$(INSTALLDIRBIN)
+	$(INSTALL) -m 755 natpmpc-shared $(DESTDIR)$(INSTALLDIRBIN)/natpmpc
+	ln -s -f $(SONAME) $(DESTDIR)$(INSTALLDIRLIB)/$(SHAREDLIB)
 
 $(JNIHEADERS): fr/free/miniupnp/libnatpmp/NatPmp.class
 	$(JAVAH) -jni fr.free.miniupnp.libnatpmp.NatPmp
@@ -169,11 +169,11 @@ mvn_install:
 	 -DcreateChecksum=true
 
 cleaninstall:
-	$(RM) $(addprefix $(INSTALLDIRINC), $(HEADERS))
-	$(RM) $(INSTALLDIRLIB)/$(SONAME)
-	$(RM) $(INSTALLDIRLIB)/$(SHAREDLIB)
-	$(RM) $(INSTALLDIRLIB)/$(STATICLIB)
-	$(RM) $(INSTALLDIRLIB)/$(PKGCONFIGDIR)
+	$(RM) $(addprefix $(DESTDIR)$(INSTALLDIRINC)/, $(HEADERS))
+	$(RM) $(DESTDIR)$(INSTALLDIRLIB)/$(SONAME)
+	$(RM) $(DESTDIR)$(INSTALLDIRLIB)/$(SHAREDLIB)
+	$(RM) $(DESTDIR)$(INSTALLDIRLIB)/$(STATICLIB)
+	$(RM) $(DESTDIR)$(PKGCONFIGDIR)
 
 natpmp.pc: VERSION
 	$(RM) $@