diff --git a/tiff.changes b/tiff.changes
index 7d1d1da..3bd8498 100644
--- a/tiff.changes
+++ b/tiff.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Tue Nov 13 10:20:45 UTC 2018 - Tomáš Chvátal <tchvatal@suse.com>
+
+- Support only SLE12+ and remove the no longer needed conditions
+
 -------------------------------------------------------------------
 Tue Nov 13 08:18:54 UTC 2018 - Petr Gajdos <pgajdos@suse.com>
 
diff --git a/tiff.spec b/tiff.spec
index fb59a78..3662cd3 100644
--- a/tiff.spec
+++ b/tiff.spec
@@ -18,14 +18,13 @@
 
 %define asan_build 0
 %define debug_build 0
-
 Name:           tiff
 Version:        4.0.10
 Release:        0
 Summary:        Tools for Converting from and to the Tagged Image File Format
 License:        HPND
 Group:          Productivity/Graphics/Convertors
-Url:            http://www.simplesystems.org/libtiff/
+URL:            http://www.simplesystems.org/libtiff/
 Source:         http://download.osgeo.org/libtiff/tiff-%{version}.tar.gz
 Source2:        README.SUSE
 Source3:        baselibs.conf
@@ -36,26 +35,12 @@ Patch1:         tiff-4.0.3-compress-warning.patch
 # https://gitlab.com/libtiff/libtiff/merge_requests/44
 Patch2:         tiff-CVE-2018-12900.patch
 BuildRequires:  gcc-c++
+BuildRequires:  libjbig-devel
 BuildRequires:  libjpeg-devel
 BuildRequires:  libtool
-BuildRequires:  zlib-devel
-BuildRoot:      %{_tmppath}/%{name}-%{version}-build
-%if 0%{?suse_version} > 1030
 BuildRequires:  lzma-devel
-%endif
-%if 0%{?suse_version} <= 1000
 BuildRequires:  pkgconfig
-%endif
-%if 0%{?suse_version} > 1000
-BuildRequires:  pkg-config
-%endif
-# bug437293
-%ifarch ppc64
-Obsoletes:      tiff-64bit
-%endif
-%if 0%{?suse_version} > 1210
-BuildRequires:  libjbig-devel
-%endif
+BuildRequires:  pkgconfig(zlib)
 
 %description
 This package contains the library and support programs for the TIFF
@@ -65,11 +50,6 @@ image format.
 Summary:        The Tiff Library (with JPEG and compression support)
 Group:          System/Libraries
 Provides:       libtiff = %{version}
-# bug437293
-%ifarch ppc64
-Obsoletes:      libtiff-64bit
-%endif
-#
 
 %description -n libtiff5
 This package includes the tiff libraries. To link a program with
@@ -82,11 +62,6 @@ Group:          Development/Libraries/C and C++
 Requires:       glibc-devel
 Requires:       libstdc++-devel
 Requires:       libtiff5 = %{version}
-# bug437293
-%ifarch ppc64
-Obsoletes:      tiff-devel-64bit
-%endif
-#
 
 %description -n libtiff-devel
 This package contains the header files and static libraries for
@@ -112,7 +87,7 @@ make %{?_smp_mflags} LDFLAGS="-pie"
 
 %install
 mkdir -p %{buildroot}/{%{_mandir}/{man1,man3},usr/{bin,lib,include}}
-make DESTDIR=%{buildroot} install %{?_smp_mflags}
+%make_install
 for f in `find %{buildroot}/%{_mandir} -type f -print ` ; do
   if [ `wc -l <$f` -eq 1 ] && grep -q "^\.so " $f ; then
     linkto=`sed -e "s|^\.so ||" $f`
@@ -141,23 +116,20 @@ for i in tools test; do
 done
 
 %post -n libtiff5 -p /sbin/ldconfig
-
 %postun -n libtiff5 -p /sbin/ldconfig
 
 %files
-%defattr(-,root,root)
 %{_bindir}/*
 %doc html
-%doc README.md COPYRIGHT VERSION ChangeLog TODO RELEASE-DATE
+%doc README.md VERSION ChangeLog TODO RELEASE-DATE
 %{_mandir}/man1/*
 
 %files -n libtiff5
-%defattr(-,root,root)
-%doc README.md COPYRIGHT README.SUSE
+%license COPYRIGHT
+%doc README.md README.SUSE
 %{_libdir}/*.so.*
 
 %files -n libtiff-devel
-%defattr(-,root,root)
 %{_includedir}/*
 %{_libdir}/*.so
 %{_libdir}/pkgconfig/*.pc