diff --git a/devel/Makefile b/devel/Makefile
index c36f87c339da..bde27d6cf750 100644
--- a/devel/Makefile
+++ b/devel/Makefile
@@ -3239,6 +3239,7 @@
     SUBDIR += p5-constant
     SUBDIR += p5-constant-boolean
     SUBDIR += p5-constant-def
+    SUBDIR += p5-constant-defer
     SUBDIR += p5-constant-lexical
     SUBDIR += p5-cpan-listchanges
     SUBDIR += p5-enum
diff --git a/devel/p5-constant-defer/Makefile b/devel/p5-constant-defer/Makefile
new file mode 100644
index 000000000000..0418a1994828
--- /dev/null
+++ b/devel/p5-constant-defer/Makefile
@@ -0,0 +1,18 @@
+# Created by: Sunpoet Po-Chuan Hsieh <sunpoet@FreeBSD.org>
+# $FreeBSD$
+
+PORTNAME=	constant-defer
+PORTVERSION=	6
+CATEGORIES=	devel perl5
+MASTER_SITES=	CPAN
+PKGNAMEPREFIX=	p5-
+
+MAINTAINER=	sunpoet@FreeBSD.org
+COMMENT=	Constant subs with deferred value calculation
+
+LICENSE=	GPLv3
+
+USE_PERL5=	configure
+USES=		perl5
+
+.include <bsd.port.mk>
diff --git a/devel/p5-constant-defer/distinfo b/devel/p5-constant-defer/distinfo
new file mode 100644
index 000000000000..6de154906f91
--- /dev/null
+++ b/devel/p5-constant-defer/distinfo
@@ -0,0 +1,2 @@
+SHA256 (constant-defer-6.tar.gz) = 7b21263198ca22686efff3ae987a240be423dd2160afdeb29fe716d032986ffa
+SIZE (constant-defer-6.tar.gz) = 43427
diff --git a/devel/p5-constant-defer/pkg-descr b/devel/p5-constant-defer/pkg-descr
new file mode 100644
index 000000000000..cf0a623bc9a4
--- /dev/null
+++ b/devel/p5-constant-defer/pkg-descr
@@ -0,0 +1,15 @@
+constant::defer creates a subroutine which on the first call runs given code to
+calculate its value, and on any subsequent calls just returns that value, like a
+constant. The value code is discarded once run, allowing it to be garbage
+collected.
+
+Deferring a calculation is good if it might take a lot of work or produce a big
+result but is only needed sometimes or only well into a program run. If it's
+never needed then the value code never runs.
+
+A deferred constant is generally not inlined or folded (see "Constant Folding"
+in perlop) since it's not a single scalar value. In the current implementation a
+deferred constant becomes a plain constant after the first use, so may inline
+etc in code compiled after that (see "IMPLEMENTATION" below).
+
+WWW: http://search.cpan.org/dist/constant-defer/
diff --git a/devel/p5-constant-defer/pkg-plist b/devel/p5-constant-defer/pkg-plist
new file mode 100644
index 000000000000..4f62d47ffda0
--- /dev/null
+++ b/devel/p5-constant-defer/pkg-plist
@@ -0,0 +1,2 @@
+%%SITE_PERL%%/constant/defer.pm
+%%PERL5_MAN3%%/constant::defer.3.gz