diff --git a/lib/SNMP/Info/Layer2/Allied.pm b/lib/SNMP/Info/Layer2/Allied.pm
index 722fc947..fe71580f 100644
--- a/lib/SNMP/Info/Layer2/Allied.pm
+++ b/lib/SNMP/Info/Layer2/Allied.pm
@@ -73,6 +73,7 @@ sub os_ver {
     if ( $descr =~ m/version (\d+\.\d+)/ ) {
         return $1;
     }
+    return;
 }
 
 sub model {