diff --git a/xCAT-buildkit/lib/perl/xCAT/BuildKitUtils.pm b/xCAT-buildkit/lib/perl/xCAT/BuildKitUtils.pm
index d53239032..2028d34c1 100644
--- a/xCAT-buildkit/lib/perl/xCAT/BuildKitUtils.pm
+++ b/xCAT-buildkit/lib/perl/xCAT/BuildKitUtils.pm
@@ -378,6 +378,12 @@ sub osver
         $ver = $lines[0];
         $ver =~ s/\.//;
         $ver =~ s/[^0-9]*([0-9]+).*/$1/;
+        my $minorver;
+        if (grep /PATCHLEVEL/, $lines[2]) {
+            $minorver = $lines[2];
+            $minorver =~ s/PATCHLEVEL[^0-9]*([0-9]+).*/$1/;
+        }
+        $ver = $ver . ".$minorver" if ( $minorver );
     }
     elsif (-f "/etc/UnitedLinux-release")
     {