diff --git a/app/models/operatingsystems/debian.rb b/app/models/operatingsystems/debian.rb
index efa6733c3f4..705b3ec7e58 100644
--- a/app/models/operatingsystems/debian.rb
+++ b/app/models/operatingsystems/debian.rb
@@ -81,7 +81,7 @@ def guess_os
   def is_subiquity?
     return false if guess_os != "ubuntu"
     return false if major.to_i < 20
-    return false if major.to_i == 20 && minor.to_i <= 2
+    return false if major.to_i == 20 && minor.present? && minor.to_i <= 2
     true # Ubuntu release 20.04.3 or newer
   end