diff --git a/gzip.changes b/gzip.changes
index 6a03145..9da2c11 100644
--- a/gzip.changes
+++ b/gzip.changes
@@ -1,3 +1,15 @@
+-------------------------------------------------------------------
+Wed May 31 02:54:52 UTC 2017 - bwiedemann@suse.com
+
+- Make build reproducible in spite of gcc profile based optimizations
+  (boo#1040589)
+
+-------------------------------------------------------------------
+Tue May 30 09:59:59 UTC 2017 - src@posteo.de
+
+- changing the way how gcc profiling is generating to have a reproducible
+  build
+
 -------------------------------------------------------------------
 Tue Apr 11 14:08:21 UTC 2017 - kstreitova@suse.com
 
diff --git a/gzip.spec b/gzip.spec
index 5d8a4cd..62a9724 100644
--- a/gzip.spec
+++ b/gzip.spec
@@ -66,8 +66,8 @@ profile_gzip()
 {
   tmpfile=$(mktemp)
   trap "rm -f $tmpfile $tmpfile.gz" EXIT
-  tar -cf $tmpfile %{_prefix} || true
-  time ./gzip $tmpfile
+  xz -cd %{SOURCE0} > $tmpfile
+  time ./gzip < $tmpfile > $tmpfile.gz
   time ./gzip -d < $tmpfile.gz > /dev/null
 }
 %if %{do_profiling}