diff --git a/gnome-doc-utils.changes b/gnome-doc-utils.changes
index 7139ef4..8eb31fb 100644
--- a/gnome-doc-utils.changes
+++ b/gnome-doc-utils.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Mon Feb 10 10:47:28 UTC 2020 - Frederic Crozat <fcrozat@suse.com>
+
+- Set encoding before building to fix a build error in SLE.
+- Adapt BuildRequires for SLE15 / Leap 15.x.
+
 -------------------------------------------------------------------
 Thu Feb  6 07:30:41 UTC 2020 - Bjørn Lie <bjorn.lie@gmail.com>
 
diff --git a/gnome-doc-utils.spec b/gnome-doc-utils.spec
index f54cf94..4a07c9d 100644
--- a/gnome-doc-utils.spec
+++ b/gnome-doc-utils.spec
@@ -32,7 +32,11 @@ Patch1:         gnome-doc-utils-port-python3.patch
 BuildRequires:  docbook_4
 BuildRequires:  fdupes
 BuildRequires:  intltool
+%if %suse_version > 1500
 BuildRequires:  python3-libxml2
+%else
+BuildRequires:  python3-libxml2-python
+%endif
 # needed for xmllint
 BuildRequires:  libxml2-tools
 BuildRequires:  libxslt-devel
@@ -89,6 +93,7 @@ free-form XML documents and outputs gettext compatible POT files.
 translation-update-upstream
 
 %build
+export LANG=C.UTF-8
 %configure \
 	--disable-scrollkeeper \
 	%{nil}