diff --git a/BUILDING b/BUILDING
index bbd652778c7fb6862d638ac747ddf4ca54822d6f..19f637074225cfa9cc26a2583da2b654ec0f1deb 100644
--- a/BUILDING
+++ b/BUILDING
@@ -668,3 +668,5 @@ to get PCL included.  This is also a good check to see if everything
 was compiled properly.  A full set of builds via build.sh might be
 good at this point too.
 
+Some of the details for each command may have changed;  You can get
+help for each command by using the -h argument.
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