diff --git a/zlib-1.2.11.tar.gz.asc b/zlib-1.2.11.tar.gz.asc
new file mode 100644
index 0000000..accd4d2
--- /dev/null
+++ b/zlib-1.2.11.tar.gz.asc
@@ -0,0 +1,7 @@
+-----BEGIN PGP SIGNATURE-----
+Comment: GPGTools - http://gpgtools.org
+
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+-----END PGP SIGNATURE-----
diff --git a/zlib.changes b/zlib.changes
index 80d63bd..cb03c6d 100644
--- a/zlib.changes
+++ b/zlib.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Thu Jun  1 13:34:38 UTC 2017 - mpluskal@suse.com
+
+- Add gpg signature
+- Re-enable profiling
+
 -------------------------------------------------------------------
 Wed May 10 13:43:08 UTC 2017 - mpluskal@suse.com
 
diff --git a/zlib.keyring b/zlib.keyring
new file mode 100644
index 0000000..df8ac8e
--- /dev/null
+++ b/zlib.keyring
@@ -0,0 +1,38 @@
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diff --git a/zlib.spec b/zlib.spec
index 867aecc..3f55e3d 100644
--- a/zlib.spec
+++ b/zlib.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package zlib
 #
-# Copyright (c) 2015 SUSE LINUX GmbH, Nuernberg, Germany.
+# Copyright (c) 2017 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
@@ -16,7 +16,6 @@
 #
 
 
-%bcond_with profiling
 Name:           zlib
 Version:        1.2.11
 Release:        0
@@ -25,9 +24,11 @@ License:        Zlib
 Group:          Development/Libraries/C and C++
 Url:            http://www.zlib.net/
 Source0:        http://zlib.net/zlib-%{version}.tar.gz
-Source1:        LICENSE
-Source2:        baselibs.conf
-Source3:        zlib-rpmlintrc
+Source1:        http://zlib.net/zlib-%{version}.tar.gz.asc
+Source2:        %{name}.keyring
+Source4:        LICENSE
+Source5:        baselibs.conf
+Source6:        zlib-rpmlintrc
 #PATCH-FIX-SUSE: fate#314093, sent upstream by IBM
 Patch0:         zlib-1.2.11-optimized-s390.patch
 #PATCH-FIX-SUSE: compiler check of varguments passed to gzprintf
@@ -36,7 +37,6 @@ BuildRequires:  autoconf
 BuildRequires:  automake
 BuildRequires:  libtool
 BuildRequires:  pkgconfig
-BuildRoot:      %{_tmppath}/%{name}-%{version}-build
 
 %description
 zlib is a general-purpose lossless data-compression library,
@@ -118,7 +118,6 @@ developing applications which use minizip.
 
 %build
 export LDFLAGS="-Wl,-z,relro,-z,now"
-
 export CFLAGS="%{optflags}"
 # For sure not autotools build
 CC="cc" ./configure \
@@ -126,16 +125,13 @@ CC="cc" ./configure \
     --prefix=%{_prefix} \
     --libdir=/%{_lib}
 
-# Marcus: breaks example64 in 32bit builds, so it's disabled by default
-%if %{with profiling}
-profiledir=$(mktemp -d)
-trap "rm -rf $profiledir" EXIT
-make CFLAGS="%{optflags} %{cflags_profile_generate}=$profiledir" %{?_smp_mflags}
-time make check %{?_smp_mflags}
-make %{?_smp_mflags} clean
-make CFLAGS="%{optflags} %{cflags_profile_feedback}=$profiledir" %{?_smp_mflags}
+%if %{do_profiling}
+  make %{?_smp_mflags} CFLAGS="%{optflags} %{cflags_profile_generate}"
+  make check %{?_smp_mflags}
+  make clean
+  make %{?_smp_mflags} CFLAGS="%{optflags} %{cflags_profile_feedback}"
 %else
-make %{?_smp_mflags}
+  make %{?_smp_mflags}
 %endif
 
 # And build minizip
@@ -147,11 +143,11 @@ autoreconf -fvi
 make %{?_smp_mflags}
 
 %check
-time make check %{?_smp_mflags}
+make check %{?_smp_mflags}
 
 %install
 mkdir -p %{buildroot}%{_libdir}
-make DESTDIR=%{buildroot} install %{?_smp_mflags}
+%make_install
 # Fix shared library placement/symlinks
 ln -s -v /%{_lib}/$(readlink %{buildroot}/%{_lib}/libz.so) %{buildroot}%{_libdir}/libz.so
 rm -v %{buildroot}/%{_lib}/libz.so
@@ -168,15 +164,12 @@ cp -r examples/ %{buildroot}%{_docdir}/%{name}/
 
 # Install minizip
 cd contrib/minizip
-make DESTDIR=%{buildroot} install %{?_smp_mflags}
+%make_install
 find %{buildroot} -type f -name "*.la" -delete -print
 
 %post -n libz1 -p /sbin/ldconfig
-
 %postun -n libz1 -p /sbin/ldconfig
-
 %post -n libminizip1 -p /sbin/ldconfig
-
 %postun -n libminizip1 -p /sbin/ldconfig
 
 %files -n libz1
@@ -190,7 +183,7 @@ find %{buildroot} -type f -name "*.la" -delete -print
 %dir %{_docdir}/%{name}/
 %dir %{_docdir}/%{name}/examples
 %{_docdir}/%{name}/examples/*
-%{_mandir}/man3/zlib.3.gz
+%{_mandir}/man3/zlib.3%{ext_man}
 %{_includedir}/zlib.h
 %{_includedir}/zconf.h
 %{_includedir}/zutil.h