diff --git a/perl-xCAT/xCAT/PPCcfg.pm b/perl-xCAT/xCAT/PPCcfg.pm
index f9ee53042..cbb8f89b1 100644
--- a/perl-xCAT/xCAT/PPCcfg.pm
+++ b/perl-xCAT/xCAT/PPCcfg.pm
@@ -408,7 +408,7 @@ sub sshcfg {
         # Find logon in key file 
         #################################
         foreach ( @$result ) {
-            if ( /= $logon$/ ) {
+            if ( /$logon$/ ) {
                 return( [[$server,"enabled",SUCCESS]] );
             }
         }
diff --git a/perl-xCAT/xCAT/PPCcli.pm b/perl-xCAT/xCAT/PPCcli.pm
index 7a21f8eaa..18bf7ddd3 100644
--- a/perl-xCAT/xCAT/PPCcli.pm
+++ b/perl-xCAT/xCAT/PPCcli.pm
@@ -966,7 +966,7 @@ sub mkauthkeys {
         # When adding, remove old keys first
         #####################################
         foreach ( @$result ) {
-            unless ( /= $logon$/ ) {
+            unless ( /$logon$/ ) {
                 push @authkey, $_;
             }
         }