diff --git a/0001-add-missing-xmlns-loext-to-example_sl-SI.xml.patch b/0001-add-missing-xmlns-loext-to-example_sl-SI.xml.patch
new file mode 100644
index 0000000..cad796d
--- /dev/null
+++ b/0001-add-missing-xmlns-loext-to-example_sl-SI.xml.patch
@@ -0,0 +1,36 @@
+From 3766e78348d52b9491179c32e9062e25e58250f7 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Caol=C3=A1n=20McNamara?= <caolanm@redhat.com>
+Date: Thu, 27 May 2021 11:13:29 +0100
+Subject: [PATCH] add missing xmlns:loext to example_sl-SI.xml
+
+added to example.xml by
+
+commit 71ee09947d5a71105d64fd225bb3672dfa7ce834
+Date:   Tue Sep 19 15:37:04 2017 +0200
+
+    TSCP: add advanced classification dialog
+
+but not to example_sl-SI.xml
+
+Change-Id: I8aa46554867db8c51bd118b6cc87e649b922cdfb
+Reviewed-on: https://gerrit.libreoffice.org/c/core/+/116157
+Tested-by: Jenkins
+Reviewed-by: Adolfo Jayme Barrientos <fitojb@ubuntu.com>
+---
+ sfx2/classification/example_sl-SI.xml | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/sfx2/classification/example_sl-SI.xml b/sfx2/classification/example_sl-SI.xml
+index 99e04a7aab71..13a4bcfdf29a 100644
+--- a/sfx2/classification/example_sl-SI.xml
++++ b/sfx2/classification/example_sl-SI.xml
+@@ -1,5 +1,5 @@
+ <?xml version="1.0"?>
+-<baf:BusinessAuthorization xmlns:baf="urn:tscp:names:baf:1.1">
++<baf:BusinessAuthorization xmlns:baf="urn:tscp:names:baf:1.1" xmlns:loext="urn:org:documentfoundation:names:experimental:office:xmlns:loext:1.0">
+     <baf:PolicyAuthorityName>Avtoriteta primera politike TSCP</baf:PolicyAuthorityName>
+     <baf:PolicyName>Primer politike TSCP</baf:PolicyName>
+     <baf:AdministrativeData>
+-- 
+2.31.1
+
diff --git a/libreoffice.spec b/libreoffice.spec
index 3b74f40..716d791 100644
--- a/libreoffice.spec
+++ b/libreoffice.spec
@@ -265,6 +265,7 @@ Patch12: 0002-xmllint-Namespace-prefix-menu-on-menuseparator-is-no.patch
 Patch13: 0001-allow-system-firebird-4.patch
 Patch14: 0001-Remove-unused-DOCTYPE-from-odk-examples-xcu-file.patch
 Patch15: 0001-math.desktop-include-Spreadsheet-category.patch
+Patch16: 0001-add-missing-xmlns-loext-to-example_sl-SI.xml.patch
 
 # not upstreamed
 Patch500: 0001-disable-libe-book-support.patch