diff --git a/rpmmacros b/rpmmacros
new file mode 100644
index 0000000..f8411f2
--- /dev/null
+++ b/rpmmacros
@@ -0,0 +1,11 @@
+# use as 
+# %?strip_all_nondeterminism
+# or
+# %if 0%?have_strip_nondeterminism > 0
+#    strip_nondeterminism path/to/file.zip
+# %endif
+
+%have_strip_nondeterminism 1
+%strip_all_nondeterminism() \
+ find '(' -name '*.zip' -o -name '*.jar' -o -name '*.xpi' -o -name '*.pk3' -o -name '*.mo' -o -name '*.html' -o -name '*.gz' -o -name '*.png' ')' -print0 | xargs -0 --no-run-if-empt strip-nondeterminism \
+ %{nil}
diff --git a/strip-nondeterminism.changes b/strip-nondeterminism.changes
index 37f9552..34a2762 100644
--- a/strip-nondeterminism.changes
+++ b/strip-nondeterminism.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Sun May  7 09:47:22 UTC 2017 - bwiedemann@suse.com
+
+- add rpm macro to use in spec files
+
 -------------------------------------------------------------------
 Sun Jan  1 00:00:51 UTC 2017 - bwiedemann@suse.com
 
diff --git a/strip-nondeterminism.spec b/strip-nondeterminism.spec
index 7dfee2a..6069d1a 100644
--- a/strip-nondeterminism.spec
+++ b/strip-nondeterminism.spec
@@ -24,6 +24,7 @@ License:        GPL-3.0+
 Group:          Development/Libraries/Perl
 Url:            https://anonscm.debian.org/git/reproducible/strip-nondeterminism.git
 Source:         http://http.debian.net/debian/pool/main/s/strip-nondeterminism/strip-nondeterminism_%{version}.orig.tar.gz
+Source2:        rpmmacros
 # PATCH-FIX-OPENSUSE - apk files misdetected as OOXML
 Patch0:         strip-nondeterminism-0.029-fix-apk.patch
 BuildArch:      noarch
@@ -58,6 +59,8 @@ and the strip-nondeterminism command line utility.
 %{__make} test
 
 %install
+mkdir -p %buildroot/etc/rpm/
+install -p %{SOURCE2} %buildroot/etc/rpm/macros.strip-nondeterminism
 %perl_make_install
 %perl_process_packlist
 %perl_gen_filelist
@@ -65,5 +68,6 @@ and the strip-nondeterminism command line utility.
 %files -f %{name}.files
 %defattr(-,root,root,755)
 %doc README TODO COPYING
+/etc/rpm/macros.strip-nondeterminism
 
 %changelog