diff --git a/bind-9.11-rh1647829-2.patch b/bind-9.11-rh1647829-2.patch
new file mode 100644
index 0000000..bb8b3e9
--- /dev/null
+++ b/bind-9.11-rh1647829-2.patch
@@ -0,0 +1,28 @@
+From 58e1af6ca75d035b6391708be2c2272bb8d04620 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Ond=C5=99ej=20Sur=C3=BD?= <ondrej@sury.org>
+Date: Sun, 4 Nov 2018 02:20:41 +0700
+Subject: [PATCH] Enable IDN processing (both idnin and idnout) only on tty,
+ disable it when the stdout is not a tty
+
+(cherry picked from commit 0e1bf7d017e4f6d787cbeb72cc2aa74e7f30122e)
+(cherry picked from commit 8e1cc95c943b7dfaaaaf2d9a4971861735cc3fb2)
+---
+ bin/dig/dighost.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/bin/dig/dighost.c b/bin/dig/dighost.c
+index 74791d671e..3b722ba0ff 100644
+--- a/bin/dig/dighost.c
++++ b/bin/dig/dighost.c
+@@ -825,7 +825,7 @@ make_empty_lookup(void) {
+ 	looknew->seenbadcookie = false;
+ 	looknew->badcookie = true;
+ #ifdef WITH_IDN_SUPPORT
+-	looknew->idnin = (getenv("IDN_DISABLE") == NULL);
++	looknew->idnin = isatty(1)?(getenv("IDN_DISABLE") == NULL):false;
+ 	if (looknew->idnin) {
+ 		const char *charset = getenv("CHARSET");
+ 		if (charset && !strcmp(charset, "ASCII"))
+-- 
+2.20.1
+
diff --git a/bind.spec b/bind.spec
index 00c3ad1..cd6a861 100644
--- a/bind.spec
+++ b/bind.spec
@@ -128,6 +128,8 @@ Patch161:bind-9.11-host-idn-disable.patch
 Patch163:bind-rh1663318.patch
 # https://bugzilla.redhat.com/show_bug.cgi?id=1647829
 Patch165:bind-9.11-rh1647829.patch
+# commit 8e1cc95c943b7dfaaaaf2d9a4971861735cc3fb2
+Patch166:bind-9.11-rh1647829-2.patch
 
 # SDB patches
 Patch11: bind-9.3.2b2-sdbsrc.patch
@@ -474,6 +476,7 @@ are used for building ISC DHCP.
 %patch161 -p1 -b .host-idn-disable
 %patch163 -p1 -b .rh1663318
 %patch165 -p1 -b .rh1647829
+%patch166 -p1 -b .rh1647829-2
 
 mkdir lib/dns/tests/testdata/dstrandom
 cp -a %{SOURCE50} lib/dns/tests/testdata/dstrandom/random.data
@@ -1455,6 +1458,7 @@ rm -rf ${RPM_BUILD_ROOT}
 * Sun Jan 27 2019 Petr Menšík <pemensik@redhat.com> - 32:9.11.5-2.P1
 - Update to 9.11.5-P1
 - dig prints ASCII name instead of failure (#1647829)
+- disable IDN output from scripts
 
 * Sun Jan 27 2019 Petr Menšík <pemensik@redhat.com> - 32:9.11.5-1
 - Update to 9.11.5