diff --git a/docs/source/guides/admin-guides/references/man1/makentp.1.rst b/docs/source/guides/admin-guides/references/man1/makentp.1.rst
index 715ce800f..866d2e20f 100644
--- a/docs/source/guides/admin-guides/references/man1/makentp.1.rst
+++ b/docs/source/guides/admin-guides/references/man1/makentp.1.rst
@@ -43,7 +43,7 @@ OPTIONS
 
 \ **-a|-**\ **-all**\ 
  
- Setup NTP servers for both management node and the service node.
+ Setup NTP servers for both management node and the service node. If management node has SLES installed and used as \ *ntpservers*\ , it is recommanded to use the \ **setupntp**\  postscript to set up NTP server for service nodes.
  
 
 
diff --git a/xCAT-client/pods/man1/makentp.1.pod b/xCAT-client/pods/man1/makentp.1.pod
index eab9c1cb5..28ef68f0b 100755
--- a/xCAT-client/pods/man1/makentp.1.pod
+++ b/xCAT-client/pods/man1/makentp.1.pod
@@ -38,7 +38,7 @@ To setup NTP on the compute node, add B<setupntp> postscript to the I<postscript
 
 =item B<-a|--all>          
 
-Setup NTP servers for both management node and the service node.
+Setup NTP servers for both management node and the service node. If management node has SLES installed and used as I<ntpservers>, it is recommanded to use the B<setupntp> postscript to set up NTP server for service nodes.
 
 
 =item B<-h|--help>