diff --git a/devel/p5-constant-def/DESCR b/devel/p5-constant-def/DESCR
new file mode 100644
index 000000000000..337c01bb4dfe
--- /dev/null
+++ b/devel/p5-constant-def/DESCR
@@ -0,0 +1,3 @@
+Define compile-time constant only if it wasn't previously defined elsewhere. The
+main reason is to use for debugging constants, since there is no way to change
+the value, except by editing the source.
diff --git a/devel/p5-constant-def/Makefile b/devel/p5-constant-def/Makefile
new file mode 100644
index 000000000000..bead394e3a5f
--- /dev/null
+++ b/devel/p5-constant-def/Makefile
@@ -0,0 +1,19 @@
+# $NetBSD: Makefile,v 1.1 2013/07/06 00:39:59 rodent Exp $
+#
+
+DISTNAME=	constant-def-0.01
+PKGNAME=	p5-${DISTNAME}
+CATEGORIES=	devel
+MASTER_SITES=	${MASTER_SITE_PERL_CPAN:=../../authors/id/M/MO/MONS/}
+
+MAINTAINER=	rodent@NetBSD.org
+HOMEPAGE=	http://search.cpan.org/~mons/constant-def-0.01/lib/constant/def.pm
+COMMENT=	Perl pragma to declare previously undeclared constants
+LICENSE=	${PERL5_LICENSE}
+
+DEPENDS+=	p5-Test-Simple>=0.98:../../devel/p5-Test-Simple
+DEPENDS+=	p5-constant>=1.05:../../devel/p5-constant
+DEPENDS+=	p5-ex-lib>=0.03:../../devel/p5-ex-lib
+
+.include "../../lang/perl5/module.mk"
+.include "../../mk/bsd.pkg.mk"
diff --git a/devel/p5-constant-def/PLIST b/devel/p5-constant-def/PLIST
new file mode 100644
index 000000000000..72257d59b1df
--- /dev/null
+++ b/devel/p5-constant-def/PLIST
@@ -0,0 +1,6 @@
+@comment $NetBSD: PLIST,v 1.1 2013/07/06 00:39:59 rodent Exp $
+${PERL5_SUB_INSTALLVENDORLIB}/constant/abs.pm
+${PERL5_SUB_INSTALLVENDORLIB}/constant/def.pm
+${PERL5_SUB_INSTALLVENDORARCH}/auto/constant/def/.packlist
+${PERL5_SUB_INSTALLVENDORMAN3DIR}/constant::abs.3
+${PERL5_SUB_INSTALLVENDORMAN3DIR}/constant::def.3
diff --git a/devel/p5-constant-def/distinfo b/devel/p5-constant-def/distinfo
new file mode 100644
index 000000000000..1fa4ad03f5f9
--- /dev/null
+++ b/devel/p5-constant-def/distinfo
@@ -0,0 +1,5 @@
+$NetBSD: distinfo,v 1.1 2013/07/06 00:39:59 rodent Exp $
+
+SHA1 (constant-def-0.01.tar.gz) = 0b946930dc6c1c16fe3337f5218b017f9f1a2784
+RMD160 (constant-def-0.01.tar.gz) = 82514af28e8d0b64736a5d0ba5b57901aefd8dbc
+Size (constant-def-0.01.tar.gz) = 22335 bytes