diff --git a/libzypp-17.28.1.tar.bz2 b/libzypp-17.28.1.tar.bz2
deleted file mode 100644
index 4c7ecd1..0000000
--- a/libzypp-17.28.1.tar.bz2
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:bd43be26af2a6ac277c86dfbd849eec2957b20e9873147f421354cbf1f641c95
-size 5354239
diff --git a/libzypp-17.28.2.tar.bz2 b/libzypp-17.28.2.tar.bz2
new file mode 100644
index 0000000..54fbd5d
--- /dev/null
+++ b/libzypp-17.28.2.tar.bz2
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:37bb6e5fd0053da561a31028951636c2f49e0e27725083fcd81abd297fb726c3
+size 5353982
diff --git a/libzypp.changes b/libzypp.changes
index e360d9f..b8aeae4 100644
--- a/libzypp.changes
+++ b/libzypp.changes
@@ -1,3 +1,10 @@
+-------------------------------------------------------------------
+Tue Aug 31 10:49:51 CEST 2021 - ma@suse.de
+
+- Workaround Bug 1189788: Don't allow ZYPP_SINGLE_RPMTRANS=1 on a
+  not UsrMerged Tumbleweed system.
+- version 17.28.2 (22)
+
 -------------------------------------------------------------------
 Mon Aug 23 08:39:15 CEST 2021 - ma@suse.de
 
diff --git a/libzypp.spec b/libzypp.spec
index 5c5f1eb..09b6082 100644
--- a/libzypp.spec
+++ b/libzypp.spec
@@ -40,11 +40,11 @@
 %endif
 
 Name:           libzypp
-Version:        17.28.1
+Version:        17.28.2
 Release:        0
+License:        GPL-2.0-or-later
 URL:            https://github.com/openSUSE/libzypp
 Summary:        Library for package, patch, pattern and product management
-License:        GPL-2.0-or-later
 Group:          System/Packages
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
 Source:         %{name}-%{version}.tar.bz2
@@ -245,8 +245,15 @@ Developer documentation for libzypp.
 %build
 mkdir build
 cd build
+%if 0%{?suse_version} > 1500
+# Bug 1189788 - UsrMerge: filesystem package breaks system when upgraded in a single rpm transaction
+# While the bug is not fixed, we don't allow ZYPP_SINGLE_RPMTRANS=1 on a not UsrMerged system
+export CFLAGS="%{optflags} -DNO_SINGLETRANS_USERMERGE"
+export CXXFLAGS="%{optflags} -DNO_SINGLETRANS_USERMERGE"
+%else
 export CFLAGS="%{optflags}"
 export CXXFLAGS="%{optflags}"
+%endif
 unset EXTRA_CMAKE_OPTIONS
 
 cmake -DCMAKE_INSTALL_PREFIX=%{_prefix} \
@@ -344,14 +351,14 @@ match_type: glob
   echo "
 solvable_name: $1
 match_type: glob
-version: $2
+Version:        $2
 " >> ${LOCKSFILE}
 ;;
     3 ) #TODO version
   echo "
 solvable_name: $1
 match_type: glob
-version: $2 $3
+Version:        $2 $3
 " >> ${LOCKSFILE}
   ;;
 esac