diff --git a/src/build/rules.mk b/src/build/rules.mk
index f9ab9f493c06d0e70e2f3b7cecac17291a657a11..969b14903081e3edfebba163b50dc9b0ed0aa72b 100644
--- a/src/build/rules.mk
+++ b/src/build/rules.mk
@@ -1,3 +1,9 @@
+# build/rules.mk
+#
+# Global build targets for all make systems
+#
+# $Id$
+
 $(OBJODIR):
 	$(QUIET)$(IFNOTEXIST) mkdir $(OBJODIR)