diff --git a/sys/Makefile b/sys/Makefile
index edaca5054d25..d7b4a0f95932 100644
--- a/sys/Makefile
+++ b/sys/Makefile
@@ -44,4 +44,11 @@ TAGS ${.CURDIR}/TAGS: ${.CURDIR}/cscope.files
 	rm -f ${.CURDIR}/TAGS
 	cd ${.CURDIR}; xargs etags -a < ${.CURDIR}/cscope.files
 
+# You need the textproc/glimpse ports for this.
+glimpse:
+	cd ${.CURDIR}; glimpseindex -H . -B -f -o .
+
+glimpse-clean:
+	cd ${.CURDIR}; rm -f .glimpse_*
+
 .include <bsd.subdir.mk>