diff --git a/xCAT-server/lib/xcat/plugins/anaconda.pm b/xCAT-server/lib/xcat/plugins/anaconda.pm
index ebc3f28ea..6fba3d0ca 100644
--- a/xCAT-server/lib/xcat/plugins/anaconda.pm
+++ b/xCAT-server/lib/xcat/plugins/anaconda.pm
@@ -128,7 +128,7 @@ sub process_request
 sub using_dracut
 {
     my $os = shift;
-    if ($os =~ /(rhels|rhel)(\d+)/) {
+    if ($os =~ /(rhels|rhel|centos)(\d+)/) {
         if ($2 >= 6) {
           return 1;
         }