diff --git a/xCAT-server/lib/perl/xCAT/PPC.pm b/xCAT-server/lib/perl/xCAT/PPC.pm
index dba9f36c9..1072325d3 100644
--- a/xCAT-server/lib/perl/xCAT/PPC.pm
+++ b/xCAT-server/lib/perl/xCAT/PPC.pm
@@ -17,6 +17,7 @@ use xCAT::GlobalDef;
 use xCAT::DBobjUtils;
 use xCAT_monitoring::monitorctrl;
 use Thread qw(yield);
+use xCAT::PPCdb;
 
 
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