diff --git a/README b/README
index c2f83e90..0523c530 100644
--- a/README
+++ b/README
@@ -431,6 +431,10 @@ guidelines in mind:
   Sending them to the developers list usually works too, but bits are more
   likely to fall through the cracks that way compared to the tracker.
 
+- Use printf(1) instead of echo(1) for portability reasons, and be sure to
+  invoke commands that are often found aliased (such as ls or grep etc)
+  using the "command" (or "builtin") command as appropriate.
+
 -- 
 bash-completion developers
 bash-completion-devel@lists.alioth.debian.org