diff --git a/perl-xCAT/xCAT/PPCenergy.pm b/perl-xCAT/xCAT/PPCenergy.pm
index d76461993..3b3b2f058 100644
--- a/perl-xCAT/xCAT/PPCenergy.pm
+++ b/perl-xCAT/xCAT/PPCenergy.pm
@@ -7,6 +7,7 @@ use Getopt::Long;
 use xCAT::Usage;
 use xCAT::NodeRange;
 use xCAT::DBobjUtils;
+use xCAT::FSPUtils;
 
 %::QUERY_ATTRS = (
 'savingstatus' => 1,