diff --git a/doc/ChangeLog b/doc/ChangeLog
index aa1eb74..3511613 100644
--- a/doc/ChangeLog
+++ b/doc/ChangeLog
@@ -1,3 +1,8 @@
+2007-03-21 Andrew J. Schorr <ajschorr@alumni.princeton.edu>
+
+	* Makefile.am: Patch rule for draft-zebra-00.txt to work
+	  in VPATH build environments.
+
 2006-07-28 Paul Jakma <paul.jakma@sun.com>
 
 	* main.texi: link-detect works on Solaris too.
diff --git a/doc/Makefile.am b/doc/Makefile.am
index c998e63..ed3a6d5 100644
--- a/doc/Makefile.am
+++ b/doc/Makefile.am
@@ -67,5 +67,5 @@
 	mpls/opaque_lsa.txt mpls/ospfd.conf \
 	$(figures_sources) $(figures_png) $(figures_txt)
 
-draft-zebra-00.txt:
-	groff -T ascii -ms draft-zebra-00.ms > draft-zebra-00.txt
+draft-zebra-00.txt: draft-zebra-00.ms
+	groff -T ascii -ms $< > $@