diff --git a/nixos/modules/security/acme.nix b/nixos/modules/security/acme.nix
index 12736e57b4a..3e923940692 100644
--- a/nixos/modules/security/acme.nix
+++ b/nixos/modules/security/acme.nix
@@ -129,7 +129,7 @@ in
 
       certs = mkOption {
         default = { };
-        type = with types; loaOf (submodule certOpts);
+        type = with types; attrsOf (submodule certOpts);
         description = ''
           Attribute set of certificates to get signed and renewed.
         '';