diff --git a/gengetopt.changes b/gengetopt.changes
index 24132c1..73357fa 100644
--- a/gengetopt.changes
+++ b/gengetopt.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Fri Dec 28 09:07:29 UTC 2018 - Bernhard Wiedemann <bwiedemann@suse.com>
+
+- Add reproducible.patch to make package build
+  reproducible again (boo#1047218)
+
 -------------------------------------------------------------------
 Mon Nov 12 13:54:22 CET 2018 - sbrabec@suse.com
 
diff --git a/gengetopt.spec b/gengetopt.spec
index c40e258..06f7205 100644
--- a/gengetopt.spec
+++ b/gengetopt.spec
@@ -28,6 +28,8 @@ Source1:        https://ftp.gnu.org/gnu/gengetopt/%{name}-%{version}.tar.gz.sig
 Source2:        %{name}.keyring
 # PATCH-FIX-UPSTREAM sbrabec@suse.cz savannah54996 -- Fix glibc license. https://savannah.gnu.org/bugs/?54996
 Patch1:         gengetopt-glibc-license.patch
+# PATCH-FIX-UPSTREAM bmwiedemann boo#1047218 https://savannah.gnu.org/bugs/index.php?55311
+Patch2:         reproducible.patch
 BuildRequires:  bison
 BuildRequires:  flex
 BuildRequires:  gcc-c++
@@ -46,6 +48,7 @@ reading/writing the options from/to config files is also supported.
 %prep
 %setup -q
 %patch1 -p1
+%patch2 -p1
 
 %build
 %configure
diff --git a/reproducible.patch b/reproducible.patch
new file mode 100644
index 0000000..fbc6ba7
--- /dev/null
+++ b/reproducible.patch
@@ -0,0 +1,26 @@
+https://savannah.gnu.org/bugs/index.php?55311
+Author: Bernhard M. Wiedemann <bwiedemann suse de>
+Date: 2018-12-28
+
+Use $SOURCE_DATE_EPOCH in mdate-sh
+
+When patches touch input files, output files will contain the build date
+making package build unreproducible.
+
+See https://reproducible-builds.org/ for why this matters.
+
+Index: gengetopt-2.22.6/build-aux/mdate-sh
+===================================================================
+--- gengetopt-2.22.6.orig/build-aux/mdate-sh
++++ gengetopt-2.22.6/build-aux/mdate-sh
+@@ -75,6 +75,10 @@ export LC_ALL
+ LC_TIME=C
+ export LC_TIME
+ 
++if [ -n "$SOURCE_DATE_EPOCH" ] ; then
++  exec date -d "@$SOURCE_DATE_EPOCH" -u "+%d %B %Y"
++fi
++
+ # GNU ls changes its time format in response to the TIME_STYLE
+ # variable.  Since we cannot assume `unset' works, revert this
+ # variable to its documented default.