diff --git a/infrastructure-playbooks/shrink-osd.yml b/infrastructure-playbooks/shrink-osd.yml
index 75ad7a4a2..42d96dddd 100644
--- a/infrastructure-playbooks/shrink-osd.yml
+++ b/infrastructure-playbooks/shrink-osd.yml
@@ -58,7 +58,7 @@
       fail:
         msg: "The id {{ item }} has wrong format, please pass the number only"
       with_items: "{{ osd_to_kill.split(',') }}"
-      when: not item is regex("^\d$")
+      when: not item is regex("^\d+$")
 
   tasks:
     - import_role: