diff --git a/utils/reboot_needed_check.yml b/utils/reboot_needed_check.yml
index cf7868f..631d496 100755
--- a/utils/reboot_needed_check.yml
+++ b/utils/reboot_needed_check.yml
@@ -20,7 +20,7 @@
     - name: DEBUG
       debug:
         msg: "{{ ansible_facts['nodename'] }} : {{ result.stdout }}"
-      when: result.stdout != ""
+      when: result.stdout is defined
 
     # Add info line by line
     - name: Dump all info into the local file
@@ -28,4 +28,4 @@
       lineinfile:
         path: /tmp/ansible_dump_reboot_needed.txt
         line: "{{ ansible_facts['nodename'] }} : {{ result.stdout }}"
-      when: result.stdout != ""
+      when: result.stdout is defined