diff --git a/Makefile b/Makefile
index de4af0f..f0f4864 100644
--- a/Makefile
+++ b/Makefile
@@ -41,12 +41,14 @@ install: all
 	chmod 755 ${DESTDIR}${PREFIX}/bin/startdwm
 	cp -f dwm-session.desktop /usr/share/xsessions/
 	chmod 644 /usr/share/xsessions/dwm-session.desktop
+	update-alternatives --install /usr/bin/x-session-manager x-session-manager ${DESTDIR}${PREFIX}/bin/startdwm 50
 
 uninstall:
 	rm -f ${DESTDIR}${PREFIX}/bin/dwm\
 		${DESTDIR}${MANPREFIX}/man1/dwm.1\
 		${DESTDIR}${PREFIX}/bin/startdwm\
 		/usr/share/xsessions/dwm-session.desktop
+	update-alternatives --remove x-session-manager ${DESTDIR}${PREFIX}/bin/startdwm
 
 
 .PHONY: all clean dist install uninstall