diff --git a/libetonyek/PKGBUILD b/libetonyek/PKGBUILD
index 79f9b89806..f48433e7a1 100644
--- a/libetonyek/PKGBUILD
+++ b/libetonyek/PKGBUILD
@@ -5,15 +5,22 @@
 
 pkgname=libetonyek
 pkgver=0.1.9
-pkgrel=2
+pkgrel=3
 pkgdesc='Library and a set of tools for reading and converting Apple Keynote presentations'
 arch=(x86_64 powerpc64le)
 url="https://wiki.documentfoundation.org/DLP/Libraries/libetonyek"
 license=('MPL')
 depends=('libxml2' 'zlib' 'libwpd' 'boost-libs' 'librevenge' 'liblangtag')
 makedepends=('boost' 'cppunit' 'gperf' 'doxygen' 'glm' 'mdds')
-source=(https://dev-www.libreoffice.org/src/$pkgname/$pkgname-$pkgver.tar.xz)
-sha256sums=('e61677e8799ce6e55b25afc11aa5339113f6a49cff031f336e32fa58635b1a4a')
+source=(https://dev-www.libreoffice.org/src/$pkgname/$pkgname-$pkgver.tar.xz
+	libetonyek-c++11.patch)
+sha256sums=('e61677e8799ce6e55b25afc11aa5339113f6a49cff031f336e32fa58635b1a4a'
+            'b602584b40c00876a00f9f9d58917799007a946bc02e388da3e3e7e51ed1722e')
+
+prepare() {
+  cd $pkgname-$pkgver
+  patch -Np1 -i ${srcdir}/libetonyek-c++11.patch
+}
 
 build() {
   cd $pkgname-$pkgver
diff --git a/libetonyek/libetonyek-c++11.patch b/libetonyek/libetonyek-c++11.patch
new file mode 100644
index 0000000000..69815abc30
--- /dev/null
+++ b/libetonyek/libetonyek-c++11.patch
@@ -0,0 +1,10 @@
+--- libetonyek-0.1.9/src/lib/NUM3Parser.cpp.orig	2020-12-14 13:00:46.803701086 +0100
++++ libetonyek-0.1.9/src/lib/NUM3Parser.cpp	2020-12-14 13:01:03.060064354 +0100
+@@ -7,6 +7,7 @@
+  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+  */
+ 
++#include <algorithm>
+ #include <functional>
+ 
+ #include "NUM3Parser.h"