diff --git a/libreoffice.changes b/libreoffice.changes
index 4b8b0e7..054609d 100644
--- a/libreoffice.changes
+++ b/libreoffice.changes
@@ -1,3 +1,10 @@
+-------------------------------------------------------------------
+Thu Jul 18 16:19:37 UTC 2024 - Bernhard Wiedemann <bwiedemann@suse.com>
+
+- Add reproducible-clucene.patch to use new clucene function
+  to make index files reproducible (boo#1047218)
+- Normalize .jar and .zip mtimes with strip-nondeterminism
+
 -------------------------------------------------------------------
 Thu Jul 11 21:03:49 UTC 2024 - Fridrich Strba <fstrba@suse.com>
 
diff --git a/libreoffice.spec b/libreoffice.spec
index e824536..3c2d6df 100644
--- a/libreoffice.spec
+++ b/libreoffice.spec
@@ -151,6 +151,8 @@ Patch992:       python34-no-f-strings.patch
 Patch993:       icu-74-compatibility.patch
 # PATCH-FIX-UPSTREAM CVE-2024-5261 (bsc#1226975)
 Patch994:       cve-2024-5261.patch
+# PATCH-FIX-OPENSUSE override date in clucene files (boo#1047218)
+Patch995:       reproducible-clucene.patch
 BuildRequires:  %{name}-share-linker
 BuildRequires:  ant
 BuildRequires:  autoconf
@@ -161,6 +163,9 @@ BuildRequires:  commons-logging
 BuildRequires:  cups-devel
 BuildRequires:  fixmath-devel
 BuildRequires:  libwebp-devel
+%if 0%{?suse_version} > 1500
+BuildRequires:  strip-nondeterminism
+%endif
 BuildRequires:  zlib-devel
 BuildRequires:  zxcvbn-devel
 %if %{with system_curl}
@@ -1131,6 +1136,9 @@ sed -i -e /CppunitTest_sc_dataprovider/d sc/Module_sc.mk # https://bugs.document
 sed -i -e /CppunitTest_sc_financial_functions_test/d sc/Module_sc.mk # https://bugs.documentfoundation.org/show_bug.cgi?id=127083
 sed -i -e /CppunitTest_sc_statistical_functions_test/d sc/Module_sc.mk
 %endif
+if grep -q setSegmentInfoStartVersion /usr/include/CLucene/index/IndexWriter.h ; then
+%patch -P 995 -p1
+fi
 # fix build with icu 75.1, remove breaking test breaking rule (bsc#1224309)
 sed -i "109d" i18npool/source/breakiterator/data/sent.txt
 
@@ -1557,6 +1565,11 @@ rm %{buildroot}%{_libdir}/libreoffice/share/extensions/*/help/*/*.ht_
 rm %{buildroot}%{_libdir}/libreoffice/share/extensions/wiki-publisher/help/sa-IN/help.key_
 rm %{buildroot}%{_libdir}/libreoffice/share/extensions/nlpsolver/locale/NLPSolverCommon_en_US.default
 
+%if 0%{?suse_version} > 1500
+strip-all-nondeterminism %{buildroot}%{_libdir}/libreoffice
+strip-all-nondeterminism %{buildroot}%{_datadir}/%{name}
+%endif
+
 # We have ton of duped files so run over it
 %fdupes %{buildroot}%{_prefix}
 
diff --git a/reproducible-clucene.patch b/reproducible-clucene.patch
new file mode 100644
index 0000000..7a38bed
--- /dev/null
+++ b/reproducible-clucene.patch
@@ -0,0 +1,21 @@
+Date: 2024-07-18
+Author: Bernhard M. Wiedemann
+
+Use a new function in clucene-core, protected with a
+BuildRequires:  libclucene2(setStartVersion)
+
+to achieve reproducible builds for help.idxl files
+
+diff --git a/helpcompiler/source/HelpIndexer.cxx b/helpcompiler/source/HelpIndexer.cxx
+index 65e46743b..32e29c2f7 100644
+--- a/helpcompiler/source/HelpIndexer.cxx
++++ b/helpcompiler/source/HelpIndexer.cxx
+@@ -106,7 +106,7 @@ bool HelpIndexer::indexDocuments()
+                                                                    analyzer.get(), true);
+ #endif
+ 
+-#ifndef SYSTEM_CLUCENE
++#if 1
+         // avoid random values in index file, making help indices reproducible
+         writer->setSegmentInfoStartVersion(0);
+ #endif