diff --git a/app-cdr/isomaster/files/isomaster-1.3.15-ar.patch b/app-cdr/isomaster/files/isomaster-1.3.15-ar.patch
new file mode 100644
index 0000000000000..12c5ef4c36214
--- /dev/null
+++ b/app-cdr/isomaster/files/isomaster-1.3.15-ar.patch
@@ -0,0 +1,25 @@
+From 1553ea30148f69bce545b3a79ab3f7847566c50a Mon Sep 17 00:00:00 2001
+From: Sebastian Pipping <sebastian@pipping.org>
+Date: Sat, 6 Feb 2021 19:36:33 +0100
+Subject: [PATCH] Makefile: Give external AR="$(tc-getAR)" a chance to win
+
+---
+ Makefile | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/Makefile b/Makefile
+index f005099..98808f8 100644
+--- a/Makefile
++++ b/Makefile
+@@ -48,7 +48,7 @@ OPTFLAGS ?= -Wall
+ 
+ # programs used in the Makefiles:
+ export CC      ?= gcc
+-export AR      = ar
++export AR      ?= ar
+ export RM      = rm -f
+ export INSTALL = install
+ export CP      = cp
+-- 
+2.30.0
+
diff --git a/app-cdr/isomaster/isomaster-1.3.15.ebuild b/app-cdr/isomaster/isomaster-1.3.15.ebuild
index 4409476a71a0b..f9907cc82e046 100644
--- a/app-cdr/isomaster/isomaster-1.3.15.ebuild
+++ b/app-cdr/isomaster/isomaster-1.3.15.ebuild
@@ -1,4 +1,4 @@
-# Copyright 1999-2020 Gentoo Authors
+# Copyright 1999-2021 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=7
@@ -22,6 +22,7 @@ DEPEND="${RDEPEND}
 
 PATCHES=(
 	"${FILESDIR}"/${PN}-1.3.14-include-path.patch
+	"${FILESDIR}"/${PN}-1.3.15-ar.patch
 )
 
 pkg_setup() {
@@ -43,7 +44,7 @@ src_prepare() {
 }
 
 src_compile() {
-	tc-export CC
+	tc-export AR CC
 	emake "${myisoconf[@]}"
 }