diff --git a/nixos/modules/services/monitoring/prometheus/default.nix b/nixos/modules/services/monitoring/prometheus/default.nix
index 19741b46f24e..4f9be38f7f14 100644
--- a/nixos/modules/services/monitoring/prometheus/default.nix
+++ b/nixos/modules/services/monitoring/prometheus/default.nix
@@ -585,10 +585,10 @@ let
         regular expression matches.
       '';
 
-      action = mkDefOpt (types.enum ["replace" "keep" "drop"]) "replace" ''
+      action =
+        mkDefOpt (types.enum ["replace" "keep" "drop" "hashmod" "labelmap" "labeldrop" "labelkeep"]) "replace" ''
         Action to perform based on regex matching.
       '';
-
     };
   };