diff --git a/xCAT-server/lib/perl/xCAT/Postage.pm b/xCAT-server/lib/perl/xCAT/Postage.pm
index ecbd65480..ce3fd1158 100644
--- a/xCAT-server/lib/perl/xCAT/Postage.pm
+++ b/xCAT-server/lib/perl/xCAT/Postage.pm
@@ -574,6 +574,18 @@ sub makescript
         }
     }
 
+    # SLES sdk
+    if ($os =~ /sles.*/)
+    {
+        my $installdir = $::XCATSITEVALS{'installdir'} ? $::XCATSITEVALS{'installdir'} : "/install";
+        my $sdkdir = "$installdir/$os/$arch/sdk1";
+        if (-e "$sdkdir")
+        {
+            push @scriptd, "SDKDIR='" . $sdkdir . "'\n";
+            push @scriptd, "export SDKDIR\n";
+        }
+    }
+
     # check if there are sync files to be handled
     my $syncfile;
     if (   ($provmethod)
diff --git a/xCAT/postscripts/ospkgs b/xCAT/postscripts/ospkgs
index c2b4123d3..0a8354d7e 100755
--- a/xCAT/postscripts/ospkgs
+++ b/xCAT/postscripts/ospkgs
@@ -85,6 +85,12 @@ if [ -z "$OSPKGDIR" ]; then
     fi
 fi
 
+if [ "$SDKDIR" != "" ]; then 
+    if [ $mounted -eq 0 ]; then
+        SDKDIR="$NFSSERVER/$SDKDIR"
+    fi
+fi
+    
 if [ $mounted -eq 0 ]; then
     OSPKGDIR_NO_PREFIX=${OSPKGDIR#$INSTALLDIR}
 
@@ -277,6 +283,20 @@ elif ( pmatch "$OSVER" "sles11*" ); then
 	echo "ospkgs: zypper ar $path $OSVER"
 	echo "    $result"
     fi
+
+    if [ "$SDKDIR" != "" ]; then
+        if [ $mounted -eq 0 ]; then
+	    SDKDIR="http://$SDKDIR"
+        else
+            SDKDIR="file://$SDKDIR"
+        fi
+        result=`zypper ar $SDKDIR $OSVER-sdk`
+        if [ $? -ne 0 ]; then 
+	    logger -t xcat "ospkgs: zypper ar $SDKDIR $OSVER-sdk\n    $result"
+	    echo "ospkgs: zypper ar $SDKDIR $OSVER-sdk"
+	    echo "    $result"
+        fi
+    fi
     
     result=`zypper --non-interactive refresh 2>&1` 
     if [ $debug -ne 0 ]; then