diff --git a/nixos/modules/services/monitoring/grafana.nix b/nixos/modules/services/monitoring/grafana.nix
index 4fbacef788f9..d48b78ae6d02 100644
--- a/nixos/modules/services/monitoring/grafana.nix
+++ b/nixos/modules/services/monitoring/grafana.nix
@@ -111,7 +111,7 @@ in {
       type = mkOption {
         description = "Database type.";
         default = "sqlite3";
-        type = types.enum ["mysql" "sqlite3" "postgresql"];
+        type = types.enum ["mysql" "sqlite3" "postgres"];
       };
 
       host = mkOption {