diff --git a/roles/setup/tasks/main.yml b/roles/setup/tasks/main.yml
index 19ae98ef6f84bab4789dc652a5bd955c8d7f2b73..05eb07be6a95e3e885da7b53377c7cfe4a8e89fb 100644
--- a/roles/setup/tasks/main.yml
+++ b/roles/setup/tasks/main.yml
@@ -195,7 +195,7 @@
         *nat
         :POSTROUTING ACCEPT [0:0] 
         # Allow traffic from OpenVPN client to {{ vpninterface }} (change to the interface you discovered!)
-        -A POSTROUTING -s {{ vpnnetwork }} -o {{ vpninterface }} -j MASQUERADE
+        -A POSTROUTING -s {{ vpnnetwork }}/{{ vpnnetmask }} -o {{ vpninterface }} -j MASQUERADE
         COMMIT
         # END OPENVPN RULES
   - name: update /etc/default/ufw file