diff --git a/multipath-tools.changes b/multipath-tools.changes
index 38e4f78..bdec569 100644
--- a/multipath-tools.changes
+++ b/multipath-tools.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Tue Jun 20 06:57:53 UTC 2017 - bwiedemann@suse.com
+
+- set KBUILD_BUILD_TIMESTAMP to generate reproducible man-pages
+  to fix build-compare
+
 -------------------------------------------------------------------
 Wed Jun 14 08:58:23 UTC 2017 - mwilck@suse.com
 
diff --git a/multipath-tools.spec b/multipath-tools.spec
index b23ba21..0f2e6a8 100644
--- a/multipath-tools.spec
+++ b/multipath-tools.spec
@@ -176,6 +176,7 @@ This package provides development files and documentation for libdmmp.
 %setup -q -n multipath-tools-%{version}
 
 %build
+[ -n "$SOURCE_DATE_EPOCH" ] && export KBUILD_BUILD_TIMESTAMP=@$SOURCE_DATE_EPOCH
 make CC="%__cc" OPTFLAGS="%{optflags}" %{dirflags} %{makeflags}
 
 %install