diff --git a/STABLE/firewall b/STABLE/firewall
index 292677dfd..70f11a037 100755
--- a/STABLE/firewall
+++ b/STABLE/firewall
@@ -480,7 +480,7 @@ determine_hosts() {
 	    # Zone is defined in terms of hosts -- derive the interface list
 	    # from the host list
 	    #
-	    recalculate_interfacess
+	    recalculate_interfaces
 	else
 	    ####################################################################
 	    # If no hosts are defined for a zone then the zone consists of any