diff --git a/devel/ruby-io-event/Makefile b/devel/ruby-io-event/Makefile
index 9d18483029e9..92ce6119be37 100644
--- a/devel/ruby-io-event/Makefile
+++ b/devel/ruby-io-event/Makefile
@@ -1,6 +1,6 @@
-# $NetBSD: Makefile,v 1.11 2023/08/26 13:33:44 taca Exp $
+# $NetBSD: Makefile,v 1.12 2024/02/03 15:22:55 taca Exp $
 
-DISTNAME=	io-event-1.3.2
+DISTNAME=	io-event-1.4.2
 CATEGORIES=	devel
 
 MAINTAINER=	pkgsrc-users@NetBSD.org
diff --git a/devel/ruby-io-event/distinfo b/devel/ruby-io-event/distinfo
index aafe2044fa30..1ce03d015f50 100644
--- a/devel/ruby-io-event/distinfo
+++ b/devel/ruby-io-event/distinfo
@@ -1,5 +1,6 @@
-$NetBSD: distinfo,v 1.9 2023/08/26 13:33:44 taca Exp $
+$NetBSD: distinfo,v 1.10 2024/02/03 15:22:55 taca Exp $
 
-BLAKE2s (io-event-1.3.2.gem) = 514f00d52f69d1ad7da762e8a7b89b1ad2da94888e20016461535afb52c61a9b
-SHA512 (io-event-1.3.2.gem) = 796b263fb9c1072b53c9e411511462959706cabba6b938f39945ac7f1bd59640d0e65e8e01b4d2092b4667f4f47e2d5377f0946a422966fa081c38446ff4bdf0
-Size (io-event-1.3.2.gem) = 36352 bytes
+BLAKE2s (io-event-1.4.2.gem) = 4962d1d6c6342c224a7f5c394b05d541ac1a6f97f557a068c6fbe1aae998a648
+SHA512 (io-event-1.4.2.gem) = fb762e5dce931b3ff3076b28709e0e2bf8b6e830f4e854f6ef14f1a4e196e3c5918e2fbadfee4f06daa627927694446076bb122f1ab1ab79685d89315b04f02f
+Size (io-event-1.4.2.gem) = 37376 bytes
+SHA1 (patch-ext_io_event_selector_selector.h) = f273ae6b63f69b4c52b87af071a6dda77ccf8e44
diff --git a/devel/ruby-io-event/patches/patch-ext_io_event_selector_selector.h b/devel/ruby-io-event/patches/patch-ext_io_event_selector_selector.h
new file mode 100644
index 000000000000..cc5ad599e28a
--- /dev/null
+++ b/devel/ruby-io-event/patches/patch-ext_io_event_selector_selector.h
@@ -0,0 +1,14 @@
+$NetBSD: patch-ext_io_event_selector_selector.h,v 1.1 2024/02/03 15:22:55 taca Exp $
+
+selector.c require WNOHANG from <sys/wait.h>.
+
+--- ext/io/event/selector/selector.h.orig	2024-01-04 07:49:41.079012504 +0000
++++ ext/io/event/selector/selector.h
+@@ -34,6 +34,7 @@
+ #endif
+ 
+ #include <time.h>
++#include <sys/wait.h>
+ 
+ enum IO_Event {
+ 	IO_EVENT_READABLE = 1,