diff --git a/thunderbird.spec b/thunderbird.spec
index e80bfa1..1ffe8aa 100644
--- a/thunderbird.spec
+++ b/thunderbird.spec
@@ -16,6 +16,10 @@ function dist_to_rhel_minor(str, start)
   if match then
      return string.sub(match, 6)
   end
+  match = string.match(str, ".el8")
+  if match then
+     return 5
+  end
   return -1
 end}