diff --git a/doc/forum/perl5lib_and_wrappers.mdwn b/doc/forum/perl5lib_and_wrappers.mdwn
index cf14848f2..83efc7cb5 100644
--- a/doc/forum/perl5lib_and_wrappers.mdwn
+++ b/doc/forum/perl5lib_and_wrappers.mdwn
@@ -9,3 +9,5 @@ I don't know if I'm doing this right...  I'm using a server provider that doesn'
 > --[[Joey]]
 
 >> Thanks!  I found that page, but didn't recognise the importance of INSTALL_BASE.
+
+>> It looks like INSTALL_BASE only appeared in version 6.31 of the Perl MakeMaker.  My provider is still running version 6.30.  Looks like I'll be keeping my patches for the moment...  sigh.