3 files changed, 9 insertions, 9 deletions
diff --git a/perl/Wallet/ACL/Krb5.pm b/perl/Wallet/ACL/Krb5.pm
index 8c0610b..f94475f 100644
--- a/perl/Wallet/ACL/Krb5.pm
+++ b/perl/Wallet/ACL/Krb5.pm
@@ -35,11 +35,11 @@ sub check {
     my ($self, $principal, $acl) = @_;
     unless ($principal) {
         $self->error ('no principal specified');
-        return undef;
+        return;
     }
     unless ($acl) {
         $self->error ('malformed krb5 ACL');
-        return undef;
+        return;
     }
     return ($principal eq $acl) ? 1 : 0;
 }
diff --git a/perl/Wallet/ACL/NetDB.pm b/perl/Wallet/ACL/NetDB.pm
index 6437ebc..0d12703 100644
--- a/perl/Wallet/ACL/NetDB.pm
+++ b/perl/Wallet/ACL/NetDB.pm
@@ -65,11 +65,11 @@ sub check {
     my ($self, $principal, $acl) = @_;
     unless ($principal) {
         $self->error ('no principal specified');
-        return undef;
+        return;
     }
     unless ($acl) {
         $self->error ('malformed netdb ACL');
-        return undef;
+        return;
     }
     my $remctl = $self->{remctl};
     if ($Wallet::Config::NETDB_REALM) {
@@ -77,7 +77,7 @@ sub check {
     }
     unless ($remctl->command ('netdb', 'node-roles', $principal, $acl)) {
         $self->error ('cannot check NetDB ACL: ' . $remctl->error);
-        return undef;
+        return;
     }
     my ($roles, $output, $status, $error);
     do {
@@ -90,12 +90,12 @@ sub check {
             }
         } elsif ($output->type eq 'error') {
             $self->error ('cannot check NetDB ACL: ' . $output->data);
-            return undef;
+            return;
         } elsif ($output->type eq 'status') {
             $status = $output->status;
         } else {
             $self->error ('malformed NetDB remctl token: ' . $output->type);
-            return undef;
+            return;
         }
     } while ($output->type eq 'output');
     if ($status == 0) {
@@ -115,7 +115,7 @@ sub check {
         } else {
             $self->error ("error checking NetDB ACL");
         }
-        return undef;
+        return;
     }
 }
 
diff --git a/perl/Wallet/ACL/NetDB/Root.pm b/perl/Wallet/ACL/NetDB/Root.pm
index 5400d99..6ce7c88 100644
--- a/perl/Wallet/ACL/NetDB/Root.pm
+++ b/perl/Wallet/ACL/NetDB/Root.pm
@@ -37,7 +37,7 @@ sub check {
     my ($self, $principal, $acl) = @_;
     unless ($principal) {
         $self->error ('no principal specified');
-        return undef;
+        return;
     }
     unless ($principal =~ s%^([^/\@]+)/root(\@|\z)%$1$2%) {
         return 0;