diff --git a/xCAT-server-2.0/lib/xcat/plugins/centos.pm b/xCAT-server-2.0/lib/xcat/plugins/centos.pm
index a45fad09d..b2c3ebbc2 100644
--- a/xCAT-server-2.0/lib/xcat/plugins/centos.pm
+++ b/xCAT-server-2.0/lib/xcat/plugins/centos.pm
@@ -17,7 +17,8 @@ use File::Copy;
 my %distnames = (
   "1176234647.982657" => "centos5",
   "1156364963.862322" => "centos4.4",
-  "1178480581.024704" => "centos4.5"
+  "1178480581.024704" => "centos4.5",
+  "1195929648.203590" => "centos5.1"
   );
 my %numdiscs = (
   "1156364963.862322" => 4,