Merged changes from the 1.5.2p2 release.
diff --git a/Doc/html/Makefile b/Doc/html/Makefile
index 0fd1956..aa61088 100644
--- a/Doc/html/Makefile
+++ b/Doc/html/Makefile
@@ -53,7 +53,9 @@
 ref: ref/ref.html
 tut: tut/tut.html
 
-$(INDEXFILES): $(COMMONPERL) $(TOPDIR)/html/about.dat
+$(INDEXFILES): $(COMMONPERL) \
+	       $(TOPDIR)/html/about.dat \
+	       $(TOPDIR)/tools/node2label.pl
 
 # The index.html target is at the end since it screws up font-lock.