diff --git a/xCAT-client-2.0/bin/psh b/xCAT-client-2.0/bin/psh
index aad73adc4..333fc29dc 100755
--- a/xCAT-client-2.0/bin/psh
+++ b/xCAT-client-2.0/bin/psh
@@ -8,7 +8,9 @@ BEGIN
 use lib "$::XCATROOT/lib/perl";
 use IO::Socket::SSL;
 use XML::Simple;
-$XML::Simple::PREFERRED_PARSER='XML::Parser';
+if ($^O =~ /^linux/i) {
+	$XML::Simple::PREFERRED_PARSER='XML::Parser';
+}
 use Data::Dumper;
 use IO::Handle;
 use IO::Select;