diff --git a/widelands-build19-fix-build-icu.patch b/widelands-build19-fix-build-icu.patch
new file mode 100644
index 0000000..e58673a
--- /dev/null
+++ b/widelands-build19-fix-build-icu.patch
@@ -0,0 +1,13 @@
+=== modified file 'src/graphic/text/bidi.h'
+--- src/graphic/text/bidi.h	2017-01-25 18:55:59 +0000
++++ src/graphic/text/bidi.h	2018-04-02 14:32:46 +0000
+@@ -40,7 +40,7 @@
+ // True if a string contains a character from the script's code blocks
+ bool has_script_character(const char* input, UI::FontSets::Selector script);
+ UI::FontSet const* find_fontset(const char* word, const UI::FontSets& fontsets);
+-std::string icustring2string(const UnicodeString& convertme);
++std::string icustring2string(const icu::UnicodeString& convertme);
+ std::string icuchar2string(const UChar& convertme);
+ bool cannot_start_line(const UChar& c);
+ bool cannot_end_line(const UChar& c);
+
diff --git a/widelands.changes b/widelands.changes
index 60dd6f9..a1c0773 100644
--- a/widelands.changes
+++ b/widelands.changes
@@ -1,3 +1,11 @@
+-------------------------------------------------------------------
+Mon Jun 18 05:46:38 UTC 2018 - antoine.belvire@opensuse.org
+
+- Fix build on Tumbleweed (boo#1097928, lp#1760581):
+  * Add widelands-build19-fix-build-icu.patch (picked from
+    upstream).
+- Modernize spec file.
+
 -------------------------------------------------------------------
 Wed Oct 11 20:43:40 UTC 2017 - okurz@suse.com
 
diff --git a/widelands.spec b/widelands.spec
index 0128a56..dc5ee69 100644
--- a/widelands.spec
+++ b/widelands.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package widelands
 #
-# Copyright (c) 2017 SUSE LINUX GmbH, Nuernberg, Germany.
+# Copyright (c) 2018 SUSE LINUX GmbH, Nuernberg, Germany.
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -20,10 +20,12 @@ Name:           widelands
 Version:        build19
 Release:        0
 Summary:        Realtime strategy game involving map control
-License:        GPL-2.0+
+License:        GPL-2.0-or-later
 Group:          Amusements/Games/Strategy/Other
 Url:            http://www.widelands.org
 Source:         https://launchpad.net/%{name}/%{version}/%{version}/+download/%{name}-%{version}-src.tar.bz2
+# PATCH-FIX-UPSTREAM widelands-build19-fix-build-icu.patch -- https://bugs.launchpad.net/widelands/+bug/1760581
+Patch0:         widelands-build19-fix-build-icu.patch
 BuildRequires:  SDL2_gfx-devel
 BuildRequires:  SDL2_image-devel
 BuildRequires:  SDL2_mixer-devel
@@ -49,17 +51,12 @@ BuildRequires:  libicu-devel
 BuildRequires:  libjpeg-devel
 BuildRequires:  libpng-devel
 BuildRequires:  libtiff-devel
+BuildRequires:  lua51-devel
 BuildRequires:  ninja
 BuildRequires:  optipng
 BuildRequires:  python-devel
 BuildRequires:  update-desktop-files
 BuildRequires:  zlib-devel
-BuildRoot:      %{_tmppath}/%{name}-%{version}-build
-%if 0%{?suse_version} >= 1220
-BuildRequires:  lua51-devel
-%else
-BuildRequires:  lua-devel
-%endif
 Requires:       %{name}-data = %{version}
 
 %description
@@ -76,9 +73,7 @@ entire map, or a certain predetermined section of it.
 Summary:        Data files for Widelands
 Group:          Amusements/Games/Strategy/Other
 Requires:       %{name} = %{version}
-%if 0%{?suse_version} >= 1120
 BuildArch:      noarch
-%endif
 
 %description data
 Data files for Widelands. Includes localization, maps graphics and music.
@@ -93,12 +88,12 @@ operation.
 
 %prep
 %setup -q -n %{name}-%{version}-src
-# 
+%patch0
 sed -i '/wl_add_flag(WL_COMPILE_DIAGNOSTICS "-Werror=uninitialized")/d' CMakeLists.txt
 sed -i 's/\(install(TARGETS ${NAME} DESTINATION \)"."\( COMPONENT ExecutableFiles)\)/\1bin\2/' cmake/WlFunctions.cmake
 
 %build
-%{__mkdir_p} build/locale
+mkdir -p build/locale
 %define __builder ninja
 %cmake \
   -DCMAKE_INSTALL_PREFIX=%{_prefix} \
@@ -137,6 +132,7 @@ rm -f %{buildroot}%{_prefix}/{COPYING,CREDITS,ChangeLog,VERSION}
 # instead do post-install test
 PATH=%{buildroot}%{_bindir}:$PATH widelands --help | grep 'This is Widelands'
 
+%if 0%{?suse_version} < 1330
 %post
 %desktop_database_post
 %icon_theme_cache_post
@@ -144,10 +140,11 @@ PATH=%{buildroot}%{_bindir}:$PATH widelands --help | grep 'This is Widelands'
 %postun
 %desktop_database_postun
 %icon_theme_cache_postun
+%endif
 
 %files
-%defattr(-,root,root,-)
-%doc COPYING CREDITS ChangeLog
+%license COPYING
+%doc CREDITS ChangeLog
 %{_bindir}/%{name}
 %{_datadir}/icons/hicolor/*/apps/%{name}.png
 %{_datadir}/applications/%{name}.desktop
@@ -155,7 +152,6 @@ PATH=%{buildroot}%{_bindir}:$PATH widelands --help | grep 'This is Widelands'
 %{_datadir}/appdata/widelands.appdata.xml
 
 %files data -f %{name}.lang
-%defattr(-,root,root,-)
 %dir %{_datadir}/%{name}
 %dir %{_datadir}/%{name}/locale
 %dir %{_datadir}/%{name}/locale/*
@@ -163,7 +159,6 @@ PATH=%{buildroot}%{_bindir}:$PATH widelands --help | grep 'This is Widelands'
 %{_datadir}/%{name}/[^l]*
 
 %files debug
-%defattr(-,root,root,-)
 %{_bindir}/wl_*
 
 %changelog