doc: Clean the tex index files up
diff --git a/doc/Makefile.am b/doc/Makefile.am
index 4520c59..38920c8 100644
--- a/doc/Makefile.am
+++ b/doc/Makefile.am
@@ -117,6 +117,7 @@
 draft-zebra-00.txt: draft-zebra-00.ms
 	groff -T ascii -ms $< > $@
 
+CLEANFILES = *.{fn,fns,cp,cps,ky,kys}
 DISTCLEANFILES = quagga.info*
 
 # do nothing for DVI, so we don't have to generate or distribute EPS