diff --git a/devel/Makefile b/devel/Makefile
index ee3a02ddcbdb..d89c5eb82dc5 100644
--- a/devel/Makefile
+++ b/devel/Makefile
@@ -5407,6 +5407,7 @@
     SUBDIR += rubygem-ast
     SUBDIR += rubygem-astrolabe
     SUBDIR += rubygem-async
+    SUBDIR += rubygem-async-io
     SUBDIR += rubygem-atomic
     SUBDIR += rubygem-attic
     SUBDIR += rubygem-attr_required
diff --git a/devel/rubygem-async-io/Makefile b/devel/rubygem-async-io/Makefile
new file mode 100644
index 000000000000..072229b00ddd
--- /dev/null
+++ b/devel/rubygem-async-io/Makefile
@@ -0,0 +1,21 @@
+# Created by: Po-Chuan Hsieh <sunpoet@FreeBSD.org>
+# $FreeBSD$
+
+PORTNAME=	async-io
+PORTVERSION=	1.25.0
+CATEGORIES=	devel rubygems
+MASTER_SITES=	RG
+
+MAINTAINER=	sunpoet@FreeBSD.org
+COMMENT=	Provides support for asynchonous TCP, UDP, UNIX and SSL sockets
+
+LICENSE=	MIT
+
+RUN_DEPENDS=	rubygem-async>=1.14<2:devel/rubygem-async
+
+USES=		gem
+USE_RUBY=	yes
+
+NO_ARCH=	yes
+
+.include <bsd.port.mk>
diff --git a/devel/rubygem-async-io/distinfo b/devel/rubygem-async-io/distinfo
new file mode 100644
index 000000000000..bbf7e1bd4299
--- /dev/null
+++ b/devel/rubygem-async-io/distinfo
@@ -0,0 +1,3 @@
+TIMESTAMP = 1566229336
+SHA256 (rubygem/async-io-1.25.0.gem) = c9cc69e9843b2778eca79eafc7f7691dc581a1a774d953a99e7731f6abb30135
+SIZE (rubygem/async-io-1.25.0.gem) = 33792
diff --git a/devel/rubygem-async-io/pkg-descr b/devel/rubygem-async-io/pkg-descr
new file mode 100644
index 000000000000..86e093c08c10
--- /dev/null
+++ b/devel/rubygem-async-io/pkg-descr
@@ -0,0 +1,4 @@
+Async::IO provides builds on async and provides asynchronous wrappers for IO,
+Socket, and related classes.
+
+WWW: https://github.com/socketry/async-io