diff --git a/xCAT-server/lib/xcat/plugins/kvm.pm b/xCAT-server/lib/xcat/plugins/kvm.pm
index f87c55262..914912bc3 100644
--- a/xCAT-server/lib/xcat/plugins/kvm.pm
+++ b/xCAT-server/lib/xcat/plugins/kvm.pm
@@ -24,9 +24,7 @@ my $nthash; #to store nodetype data
 my $hmhash;
 
 use XML::Simple;
-if ($^O =~ /^linux/i) {
- $XML::Simple::PREFERRED_PARSER='XML::Parser';
-}
+$XML::Simple::PREFERRED_PARSER='XML::Parser';
 use Data::Dumper;
 use POSIX "WNOHANG";
 use Storable qw(freeze thaw);
diff --git a/xCAT-server/lib/xcat/plugins/nodediscover.pm b/xCAT-server/lib/xcat/plugins/nodediscover.pm
index 120fe23f6..0fc0b4a8e 100644
--- a/xCAT-server/lib/xcat/plugins/nodediscover.pm
+++ b/xCAT-server/lib/xcat/plugins/nodediscover.pm
@@ -6,9 +6,7 @@ use IO::Socket;
 use strict;
 
 use XML::Simple;
-if ($^O =~ /^linux/i) {
-	$XML::Simple::PREFERRED_PARSER='XML::Parser';
-}
+$XML::Simple::PREFERRED_PARSER='XML::Parser';
 use Data::Dumper;
 use POSIX "WNOHANG";
 use Storable qw(freeze thaw);
diff --git a/xCAT-server/lib/xcat/plugins/xen.pm b/xCAT-server/lib/xcat/plugins/xen.pm
index 287580666..5976f1c10 100644
--- a/xCAT-server/lib/xcat/plugins/xen.pm
+++ b/xCAT-server/lib/xcat/plugins/xen.pm
@@ -23,9 +23,7 @@ my $vmhash;
 my $hmhash;
 
 use XML::Simple;
-if ($^O =~ /^linux/i) {
- $XML::Simple::PREFERRED_PARSER='XML::Parser';
-}
+$XML::Simple::PREFERRED_PARSER='XML::Parser';
 use Data::Dumper;
 use POSIX "WNOHANG";
 use Storable qw(freeze thaw);