diff --git a/lib/SNMP/Info/Layer2.pm b/lib/SNMP/Info/Layer2.pm
index cfcab670..cbcc3df8 100644
--- a/lib/SNMP/Info/Layer2.pm
+++ b/lib/SNMP/Info/Layer2.pm
@@ -150,7 +150,7 @@ sub interfaces {
         my $port = $i_descr->{$iid};
         next unless defined $port;
 
-        my $port = SNMP::Info::munge_null($port);
+        $port = SNMP::Info::munge_null($port);
         $port =~ s/^\s+//; $port =~ s/\s+$//;
         next unless length $port;
 
diff --git a/lib/SNMP/Info/Layer3.pm b/lib/SNMP/Info/Layer3.pm
index 69790ff9..7dcff6e8 100644
--- a/lib/SNMP/Info/Layer3.pm
+++ b/lib/SNMP/Info/Layer3.pm
@@ -335,7 +335,7 @@ sub interfaces {
         my $port = $i_descr->{$iid};
         next unless defined $port;
 
-        my $port = SNMP::Info::munge_null($port);
+        $port = SNMP::Info::munge_null($port);
         $port =~ s/^\s+//; $port =~ s/\s+$//;
         next unless length $port;