diff --git a/gawk-5.1.1-Disable-racy-test-in-test-iolint.awk.patch b/gawk-5.1.1-Disable-racy-test-in-test-iolint.awk.patch
new file mode 100644
index 0000000..f9d1373
--- /dev/null
+++ b/gawk-5.1.1-Disable-racy-test-in-test-iolint.awk.patch
@@ -0,0 +1,55 @@
+From 0ed67a4f4f043acc08e3982a2648e3082e1f245a Mon Sep 17 00:00:00 2001
+From: "Arnold D. Robbins" <arnold@skeeve.com>
+Date: Sun, 14 Nov 2021 09:33:44 +0200
+Subject: [PATCH] Disable racy test in test/iolint.awk.
+
+---
+ test/iolint.awk | 13 ++++++++-----
+ test/iolint.ok  |  6 +-----
+ 3 files changed, 14 insertions(+), 10 deletions(-)
+
+diff --git a/test/iolint.awk b/test/iolint.awk
+index 257678ed..58fd746f 100644
+--- a/test/iolint.awk
++++ b/test/iolint.awk
+@@ -55,12 +55,15 @@ BEGIN {
+ 	print close("cat")
+ 	fflush()
+ 
++	# 11/2021: Disable this test since it's a race condition
++	# and fails intermittently on some systems.
++	#
+ 	# `%.*s' used for input pipe and output pipe
+-	"echo hello" | getline junk
+-	print "hello" | "echo hello"
+-	print close("echo hello")
+-	print close("echo hello")
+-	fflush()
++	# "echo hello" | getline junk
++	# print "hello" | "echo hello"
++	# print close("echo hello")
++	# print close("echo hello")
++	# fflush()
+ 
+ 	# `%.*s' used for output file and output pipe"
+ 	BINMODE = 2
+diff --git a/test/iolint.ok b/test/iolint.ok
+index fbf514c2..620a70f3 100644
+--- a/test/iolint.ok
++++ b/test/iolint.ok
+@@ -23,11 +23,7 @@ gawk: iolint.awk:53: warning: `cat' used for output file and output pipe
+ 0
+ hello
+ 0
+-gawk: iolint.awk:60: warning: `echo hello' used for input pipe and output pipe
+-hello
+-0
+-0
+-gawk: iolint.awk:68: warning: `cksum' used for output file and output pipe
++gawk: iolint.awk:71: warning: `cksum' used for output file and output pipe
+ 3015617425 6
+ 0
+ 0
+-- 
+2.33.1
+
diff --git a/gawk.changes b/gawk.changes
index 9ce69e1..54010dd 100644
--- a/gawk.changes
+++ b/gawk.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Sun Nov 14 17:10:48 UTC 2021 - Andreas Stieger <andreas.stieger@gmx.de>
+
+- disable racy iolint tests boo#1192521
+  add gawk-5.1.1-Disable-racy-test-in-test-iolint.awk.patch
+
 -------------------------------------------------------------------
 Sun Oct 31 11:36:18 UTC 2021 - Andreas Stieger <andreas.stieger@gmx.de>
 
diff --git a/gawk.spec b/gawk.spec
index 7b266b0..f538a70 100644
--- a/gawk.spec
+++ b/gawk.spec
@@ -27,6 +27,7 @@ Source:         http://ftp.gnu.org/gnu/%{name}/%{name}-%{version}.tar.xz
 Source2:        http://ftp.gnu.org/gnu/%{name}/%{name}-%{version}.tar.xz.sig
 Source3:        http://savannah.gnu.org/people/viewgpg.php?user_id=80653#/gawk.keyring
 Source4:        gawk.rpmlintrc
+Patch0:         gawk-5.1.1-Disable-racy-test-in-test-iolint.awk.patch
 Provides:       awk
 
 %description