diff --git a/astronaut/freshnaut b/astronaut/freshnaut
index 15d62c7..a337621 100755
--- a/astronaut/freshnaut
+++ b/astronaut/freshnaut
@@ -90,6 +90,8 @@ function get_available_versions(satellite)
     local versions = {}
     local count = 0
     for update_name in update_names:gmatch("[^,]+") do
+        assert(update_name:match(version), "Invalid update name " .. update_name .. " does not contain " .. version)
+
         local loop_regex, end_regex = make_regex(update_name, version)
 
         for x in update_file:gmatch(loop_regex) do