diff --git a/man.changes b/man.changes
index d8e0db6..9892011 100644
--- a/man.changes
+++ b/man.changes
@@ -2,6 +2,7 @@
 Thu Aug 27 07:38:06 UTC 2020 - Dr. Werner Fink <werner@suse.de>
 
 - Set libexecdir at build time for wrapper (boo#1175813)
+- Do the same in mandb.service
 
 -------------------------------------------------------------------
 Mon Jun 15 07:49:33 UTC 2020 - Dr. Werner Fink <werner@suse.de>
diff --git a/man.spec b/man.spec
index c743f5d..03c90af 100644
--- a/man.spec
+++ b/man.spec
@@ -263,6 +263,7 @@ find %{buildroot} -type f -name "*.la" -delete -print
 %if 0%{?suse_version} >= 1500
     install -m 0644 %{SOURCE8} %{buildroot}%{_unitdir}/
     install -m 0644 %{SOURCE9} %{buildroot}%{_unitdir}/
+    sed -ri 's|@@LIBEXECDIR@@|%{_libexecdir}|' %{buildroot}%{_unitdir}/mandb.service
 %endif
 %endif
 
diff --git a/mandb.service b/mandb.service
index ab00eb2..a723b0f 100644
--- a/mandb.service
+++ b/mandb.service
@@ -9,4 +9,4 @@ Group=man
 Type=oneshot
 Nice=5
 IOSchedulingClass=idle
-ExecStart=/usr/lib/man-db/do_mandb
+ExecStart=@@LIBEXECDIR@@/man-db/do_mandb