diff --git a/mailx.changes b/mailx.changes
index eebb599..ac8772f 100644
--- a/mailx.changes
+++ b/mailx.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Sat Apr 29 18:56:02 UTC 2017 - bwiedemann@suse.com
+
+- call gzip -n and drop CreationDate from manual.ps
+  to make build fully reproducible
+
 -------------------------------------------------------------------
 Fri Apr  8 15:02:17 UTC 2016 - werner@suse.de
 
diff --git a/mailx.spec b/mailx.spec
index 848aec5..828421e 100644
--- a/mailx.spec
+++ b/mailx.spec
@@ -82,8 +82,8 @@ minor enhancements like the ability to set a "From:" address.
     export CC CFLAGS
     $SHELL ./makeconfig
     make %{?jobs:-j%jobs} PREFIX=/usr CC="$CC" CFLAGS="$CFLAGS"
-    tbl < mailx.1 | groff -mandocdb -Tps > manual.ps
-    gzip -9f manual.ps
+    tbl < mailx.1 | groff -mandocdb -Tps | grep -v %%%%CreationDate > manual.ps
+    gzip -9fn manual.ps
 
 %install
     make install PREFIX=/usr DESTDIR=${RPM_BUILD_ROOT}