diff --git a/xCAT-client/bin/genimage b/xCAT-client/bin/genimage
index 313ecc391..7684b603a 100755
--- a/xCAT-client/bin/genimage
+++ b/xCAT-client/bin/genimage
@@ -161,6 +161,12 @@ if($osfamily =~ /rh/){
 	$osfamily = "rh";
 }
 
+# OS version on s390x can contain 'sp', e.g. sles11sp1
+# If the $osfamily contains 'sles' and 'sp', the $osfamily = sles
+if ($osfamily =~ /sles/ && $osfamily =~ /sp/) {
+	$osfamily = "sles";
+}
+
 #print "OSfamily: $osfamily\n";
 $profDir = "$::XCATROOT/share/xcat/netboot/$osfamily";
 unless(-d $profDir){
diff --git a/xCAT-server/share/xcat/netboot/imgutils/imgutils.pm b/xCAT-server/share/xcat/netboot/imgutils/imgutils.pm
index fcaeec6b7..396f0ad16 100644
--- a/xCAT-server/share/xcat/netboot/imgutils/imgutils.pm
+++ b/xCAT-server/share/xcat/netboot/imgutils/imgutils.pm
@@ -16,7 +16,17 @@ sub get_profile_def_filename {
    
    my $base=shift;
    my $ext=shift;
-   my $dotpos = rindex($osver, ".");
+   
+   my $dotpos;
+   
+   # OS version on s390x can contain 'sp', e.g. sles11sp1
+   # If OS version contains 'sp', get the index of 'sp' instead of '.'
+   if ($osver =~ /sles/ && $osver =~ /sp/) {
+      $dotpos = rindex($osver, "sp");
+   } else {
+      $dotpos = rindex($osver, ".");
+   }
+   
    my $osbase = substr($osver, 0, $dotpos);
    if (-r "$base/$profile.$osver.$arch.$ext") {
       return "$base/$profile.$osver.$arch.$ext";