diff --git a/devel/Makefile b/devel/Makefile
index 1fc3833a7e59..2f815349a781 100644
--- a/devel/Makefile
+++ b/devel/Makefile
@@ -5850,6 +5850,7 @@
     SUBDIR += rubygem-tty-cursor
     SUBDIR += rubygem-tty-font
     SUBDIR += rubygem-tty-platform
+    SUBDIR += rubygem-tty-screen
     SUBDIR += rubygem-turn
     SUBDIR += rubygem-typed-array
     SUBDIR += rubygem-tzinfo
diff --git a/devel/rubygem-tty-screen/Makefile b/devel/rubygem-tty-screen/Makefile
new file mode 100644
index 000000000000..36b27334ab25
--- /dev/null
+++ b/devel/rubygem-tty-screen/Makefile
@@ -0,0 +1,19 @@
+# Created by: Po-Chuan Hsieh <sunpoet@FreeBSD.org>
+# $FreeBSD$
+
+PORTNAME=	tty-screen
+PORTVERSION=	0.6.4
+CATEGORIES=	devel rubygems
+MASTER_SITES=	RG
+
+MAINTAINER=	sunpoet@FreeBSD.org
+COMMENT=	Terminal screen size detection
+
+LICENSE=	MIT
+LICENSE_FILE=	${WRKSRC}/LICENSE.txt
+
+NO_ARCH=	yes
+USE_RUBY=	yes
+USES=		gem
+
+.include <bsd.port.mk>
diff --git a/devel/rubygem-tty-screen/distinfo b/devel/rubygem-tty-screen/distinfo
new file mode 100644
index 000000000000..4334fb9dab0e
--- /dev/null
+++ b/devel/rubygem-tty-screen/distinfo
@@ -0,0 +1,3 @@
+TIMESTAMP = 1520791706
+SHA256 (rubygem/tty-screen-0.6.4.gem) = 7b190d049dfc723ab4c69a2d2e494a4d1478694001587fb20575499cef0038a6
+SIZE (rubygem/tty-screen-0.6.4.gem) = 13824
diff --git a/devel/rubygem-tty-screen/pkg-descr b/devel/rubygem-tty-screen/pkg-descr
new file mode 100644
index 000000000000..375597cc3755
--- /dev/null
+++ b/devel/rubygem-tty-screen/pkg-descr
@@ -0,0 +1,6 @@
+TTY::Screen provides independent terminal screen size detection component for
+TTY toolkit. It supports terminal screen size detection which works on various
+OS platforms and supports MRI, JRuby and Rubinius interpreters.
+
+WWW: https://piotrmurach.github.io/tty/
+WWW: https://github.com/piotrmurach/tty-screen