diff --git a/addhost b/addhost
index a2c89fe..a848968 100755
--- a/addhost
+++ b/addhost
@@ -41,7 +41,7 @@ if test -z "$cmd_hostname"; then
 fi
 
 if [[ ! $naming_override ]]; then
-  if [[ ! "$cmd_hostname" =~ ^([a-z]+)-(sthb|dco|tug)-(prod|dev|stage|test)-([1-9][0-9]*).sunet.se$ ]]; then
+  if [[ ! "$cmd_hostname" =~ ^([a-z]+)-(sthb|dco|tug|sto1|sto3)-(prod|dev|stage|test)-([1-9][0-9]*).sunet.se$ ]]; then
     echo "$cmd_hostname is not following the naming standard: function-location-environment-number.sunet.se"
     exit 1
   fi