diff --git a/roles/koji_builder/tasks/main.yml b/roles/koji_builder/tasks/main.yml
index 8a84015a3a..27b111fb2e 100644
--- a/roles/koji_builder/tasks/main.yml
+++ b/roles/koji_builder/tasks/main.yml
@@ -126,7 +126,7 @@
   - koji_builder
   notify:
   - restart kojid
-  when: Guestpy.stat.mtime > Guestpyc.stat.mtime or Guestpy.stat.mtime > Guestpyo.stat.mtime
+  when: Guestpyc.stat.mtime is defined and Guestpyo.stat.mtime is defined and Guestpy.stat.mtime > Guestpyc.stat.mtime or Guestpy.stat.mtime > Guestpyo.stat.mtime
 
 - name: enable virtlogd service
   service: name=virtlogd state=started enabled=yes