diff --git a/modules/programs/git.nix b/modules/programs/git.nix
index de5d9cd89..fae933d7e 100644
--- a/modules/programs/git.nix
+++ b/modules/programs/git.nix
@@ -13,7 +13,6 @@ let
       options = {
         key = mkOption {
           type = types.str;
-          default = null;
           description = "The default GPG signing key fingerprint.";
         };