diff --git a/xCAT-server/lib/xcat/plugins/makentp.pm b/xCAT-server/lib/xcat/plugins/makentp.pm
index ff083d2d4..c32ac744f 100755
--- a/xCAT-server/lib/xcat/plugins/makentp.pm
+++ b/xCAT-server/lib/xcat/plugins/makentp.pm
@@ -324,9 +324,9 @@ sub process_request {
         my $cmd;
         if ($os =~ /sles/) {
             if (-f "/usr/sbin/rcntpd") {
-                $cmd = "rcntpd ntptimeset";
+                $cmd = "/usr/sbin/rcntpd ntptimeset";
             } elsif (-f "/usr/sbin/rcntp") {
-                $cmd = "rcntp ntptimeset";
+                $cmd = "/usr/sbin/rcntp ntptimeset";
             } else {
                 $cmd = "sntp -P no -r $ntp_master";
             }
diff --git a/xCAT/postscripts/setupntp b/xCAT/postscripts/setupntp
index a3d07d8cf..6b74fd656 100755
--- a/xCAT/postscripts/setupntp
+++ b/xCAT/postscripts/setupntp
@@ -111,9 +111,9 @@ restrict 127.0.0.1" >>$conf_file
     #ntpdate program is deprecated on SuSE
     if ( pmatch $OSVER "sles*" ) || ( pmatch $OSVER "suse*" ) || [ -f /etc/SuSE-release ]; then
         if [ -f /usr/sbin/rcntpd ]; then
-            cmd="rcntpd ntptimeset"
+            cmd="/usr/sbin/rcntpd ntptimeset"
         elif [ -f /usr/sbin/rcntp ]; then
-            cmd="rcntp ntptimeset"
+            cmd="/usr/sbin/rcntp ntptimeset"
         else
             cmd="sntp -P no -r $ntp_master"
         fi