diff --git a/xml/snmp_sysdescr.xml b/xml/snmp_sysdescr.xml
index 4712ff0d..0ebf5156 100644
--- a/xml/snmp_sysdescr.xml
+++ b/xml/snmp_sysdescr.xml
@@ -1974,7 +1974,7 @@ Copyright (c) 1995-2005 by Cisco Systems
     <param pos="0" name="os.device" value="Firewall"/>
     <param pos="1" name="os.version"/>
   </fingerprint>
-  <fingerprint pattern="^Linux, Cisco(?: Small Business)? (RV[0-9]+(?:[A-Z]+)?(?:-[A-Z]+[0-9]+)?).+Version (\d+(?:\.\d+)+)">
+  <fingerprint pattern="^Linux, Cisco(?: Small Business)? (RV[0-9]+(?:[A-Z]*)(?:-[A-Z]+[0-9]+)?).+Version (\d+(?:\.\d+)+)">
     <description>Cisco Small Business RV Series Routers</description>
     <example os.version="1.4.2.17" hw.model="RV320">Linux, Cisco RV320, Version 1.4.2.17 Mon Oct 30 15:52:47 CST 2017</example>
     <example os.version="1.0.03.21" hw.model="RV345-K9">Linux, Cisco Small Business RV345-K9, Version 1.0.03.21 Wed Mar 10 04:42:23 IST 2021</example>