diff --git a/go_modules/lib/dependabot/go_modules/file_fetcher.rb b/go_modules/lib/dependabot/go_modules/file_fetcher.rb
index 97ce3da2278..678beb80bd8 100644
--- a/go_modules/lib/dependabot/go_modules/file_fetcher.rb
+++ b/go_modules/lib/dependabot/go_modules/file_fetcher.rb
@@ -15,6 +15,8 @@ def self.required_files_message
       end
 
       def package_manager_version
+        return nil unless go_mod
+
         {
           ecosystem: "gomod",
           package_managers: {