diff --git a/rubygem-ruby-augeas.spec b/rubygem-ruby-augeas.spec
index 02561c7..6b82436 100644
--- a/rubygem-ruby-augeas.spec
+++ b/rubygem-ruby-augeas.spec
@@ -10,7 +10,7 @@ Summary:        Ruby bindings for augeas
 License:        LGPL-2.1-or-later
 Group:          Development/Languages/Ruby
 URL:            https://augeas.net/
-Source:         https://rubygems.org/gems/%{mod_full_name}.gem
+Source0:         https://rubygems.org/gems/%{mod_full_name}.gem
 # MANUAL
 BuildRequires:  augeas-devel
 BuildRequires:  pkgconfig