diff --git a/bird/bird.conf.tmpl b/bird/bird.conf.tmpl
index 420a5e3..72c5900 100644
--- a/bird/bird.conf.tmpl
+++ b/bird/bird.conf.tmpl
@@ -74,7 +74,7 @@ protocol kernel {               # Primary routing table
 # the global mesh network.
 function net_lixonet_global()
 {
-    return net ~ [ ${network_address}/{${global_prefix:-16},32} ];
+    return net ~ [ ${network_address}/${global_prefix:-16}+ ];
 }
 
 # Returns TRUE if the given tested network is within the router network prefix for
@@ -82,7 +82,7 @@ function net_lixonet_global()
 # for us.  Helps prevent a security vulnerability of hijacking another router.
 function net_lixonet_router()
 {
-    return net ~ [ ${network_address}/{${router_prefix:-24},32} ];
+    return net ~ [ ${network_address}/${router_prefix:-24}+ ];
 }
 
 filter lixonet_import