diff --git a/nixos/modules/services/monitoring/prometheus/sachet.nix b/nixos/modules/services/monitoring/prometheus/sachet.nix
index f1aa750b2f2..c908d599bd4 100644
--- a/nixos/modules/services/monitoring/prometheus/sachet.nix
+++ b/nixos/modules/services/monitoring/prometheus/sachet.nix
@@ -14,7 +14,7 @@ in
       configuration = mkOption {
         type = types.nullOr types.attrs;
         default = null;
-        example = literalExample ''
+        example = literalExpression ''
           {
             providers = {
               twilio = {