--- a/make-rules/shared-macros.mk	Tue Apr 07 12:35:47 2015 -0600
+++ b/make-rules/shared-macros.mk	Tue Apr 07 15:54:25 2015 -0700
@@ -474,10 +474,11 @@
 # Not necessarily the system's default version, i.e. /usr/bin/perl
 PERL_VERSION ?=  5.12
 
-PERL_VERSIONS = 5.12 5.16
+PERL_VERSIONS = 5.12 5.16 5.20
 
 PERL.5.12 =     /usr/perl5/5.12/bin/perl
 PERL.5.16 =	/usr/perl5/5.16/bin/perl
+PERL.5.20 =     /usr/perl5/5.20/bin/perl
 PERL.5.12-mt =	/usr/perl5/5.12/bin/perl-threaded
 
 PERL =          $(PERL.$(PERL_VERSION))