diff --git a/tasks/ip_validation.yaml b/tasks/ip_validation.yaml
index eabcd78..0ef41db 100644
--- a/tasks/ip_validation.yaml
+++ b/tasks/ip_validation.yaml
@@ -25,5 +25,5 @@
 
 - name: Use user input only if provided, otherwise keep the default (netmask)
   ansible.builtin.set_fact:
-    guest_netmask: "{{ ip_result.user_input.split('/') | second }}"
+    guest_netmask: "{{ ip_result.user_input.split('/')[1] }}"
   when: ip_result.user_input | length > 0