diff --git a/hosts/containers/freifunk/configuration.nix b/hosts/containers/freifunk/configuration.nix
index 4d7f18bd..2f14142a 100644
--- a/hosts/containers/freifunk/configuration.nix
+++ b/hosts/containers/freifunk/configuration.nix
@@ -171,7 +171,7 @@ in {
             networks {
               172.20.72.0/21;
             };
-            stubnet 10.200.0.0/16;
+            stubnet 10.200.0.0/15;
             interface "core" {
               authentication cryptographic;
               password "${import <secrets/shared/ospf/message-digest-key.nix>}";