diff --git a/lib/types.nix b/lib/types.nix
index f7d878dfcbc5..c7e8ddcedd95 100644
--- a/lib/types.nix
+++ b/lib/types.nix
@@ -658,7 +658,6 @@ rec {
               "${lib.showOption prefix}" =
                 tagOption // {
                   loc = prefix ++ [ tagName ];
-                  definitions = [];
                 };
             })
             tags;